| blob | 8923597bd2bd215a55ba00be57deca7339930bc1 |
2 Advanced Linux Sound Architecture - Driver
3 ==========================================
4 Configuration guide
7 Kernel Configuration
8 ====================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
27 using isapnptools.
30 Creating ALSA devices
31 =====================
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
38 Module parameters
39 =================
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
47 Module snd
48 ----------
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
54 - Default: 116
55 cards_limit
56 - limiting card index for auto-loading (1-8)
57 - Default: 1
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
63 debug - Specifies the debug message level
64 (0 = disable debug prints, 1 = normal debug messages,
65 2 = verbose debug messages)
66 This option appears only when CONFIG_SND_DEBUG=y.
67 This option can be dynamically changed via sysfs
68 /sys/modules/snd/parameters/debug file.
70 Module snd-pcm-oss
71 ------------------
73 The PCM OSS emulation module.
74 This module takes options which change the mapping of devices.
76 dsp_map - PCM device number maps assigned to the 1st OSS device.
77 - Default: 0
78 adsp_map - PCM device number maps assigned to the 2st OSS device.
79 - Default: 1
80 nonblock_open
81 - Don't block opening busy PCM devices. Default: 1
83 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
84 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
85 to PCM #0 of the card #0.
86 For changing the second or later card, specify the option with
87 commas, such like "dsp_map=0,1".
89 nonblock_open option is used to change the behavior of the PCM
90 regarding opening the device. When this option is non-zero,
91 opening a busy OSS PCM device won't be blocked but return
92 immediately with EAGAIN (just like O_NONBLOCK flag).
94 Module snd-rawmidi
95 ------------------
97 This module takes options which change the mapping of devices.
98 similar to those of the snd-pcm-oss module.
100 midi_map - MIDI device number maps assigned to the 1st OSS device.
101 - Default: 0
102 amidi_map - MIDI device number maps assigned to the 2st OSS device.
103 - Default: 1
105 Common parameters for top sound card modules
106 --------------------------------------------
108 Each of top level sound card module takes the following options.
110 index - index (slot #) of sound card
111 - Values: 0 through 31 or negative
112 - If nonnegative, assign that index number
113 - if negative, interpret as a bitmask of permissible
114 indices; the first free permitted index is assigned
115 - Default: -1
116 id - card ID (identifier or name)
117 - Can be up to 15 characters long
118 - Default: the card type
119 - A directory by this name is created under /proc/asound/
120 containing information about the card
121 - This ID can be used instead of the index number in
122 identifying the card
123 enable - enable card
124 - Default: enabled, for PCI and ISA PnP cards
126 Module snd-adlib
127 ----------------
129 Module for AdLib FM cards.
131 port - port # for OPL chip
133 This module supports multiple cards. It does not support autoprobe, so
134 the port must be specified. For actual AdLib FM cards it will be 0x388.
135 Note that this card does not have PCM support and no mixer; only FM
136 synthesis.
138 Make sure you have "sbiload" from the alsa-tools package available and,
139 after loading the module, find out the assigned ALSA sequencer port
140 number through "sbiload -l". Example output:
142 Port Client name Port name
143 64:0 OPL2 FM synth OPL2 FM Port
145 Load the std.sb and drums.sb patches also supplied by sbiload:
147 sbiload -p 64:0 std.sb drums.sb
149 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
150 instead. To have the card produce sound, use aplaymidi from alsa-utils:
152 aplaymidi -p 64:0 foo.mid
154 Module snd-ad1816a
155 ------------------
157 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
159 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
161 This module supports multiple cards, autoprobe and PnP.
163 Module snd-ad1848
164 -----------------
166 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
168 port - port # for AD1848 chip
169 irq - IRQ # for AD1848 chip
170 dma1 - DMA # for AD1848 chip (0,1,3)
172 This module supports multiple cards. It does not support autoprobe
173 thus main port must be specified!!! Other ports are optional.
175 The power-management is supported.
177 Module snd-ad1889
178 -----------------
180 Module for Analog Devices AD1889 chips.
182 ac97_quirk - AC'97 workaround for strange hardware
183 See the description of intel8x0 module for details.
185 This module supports multiple cards.
187 Module snd-ali5451
188 ------------------
190 Module for ALi M5451 PCI chip.
192 pcm_channels - Number of hardware channels assigned for PCM
193 spdif - Support SPDIF I/O
194 - Default: disabled
196 This module supports one chip and autoprobe.
198 The power-management is supported.
200 Module snd-als100
201 -----------------
203 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
205 This module supports multiple cards, autoprobe and PnP.
207 The power-management is supported.
209 Module snd-als300
210 -----------------
212 Module for Avance Logic ALS300 and ALS300+
214 This module supports multiple cards.
216 The power-management is supported.
218 Module snd-als4000
219 ------------------
221 Module for sound cards based on Avance Logic ALS4000 PCI chip.
223 joystick_port - port # for legacy joystick support.
224 0 = disabled (default), 1 = auto-detect
226 This module supports multiple cards, autoprobe and PnP.
228 The power-management is supported.
230 Module snd-atiixp
231 -----------------
233 Module for ATI IXP 150/200/250/400 AC97 controllers.
235 ac97_clock - AC'97 clock (default = 48000)
236 ac97_quirk - AC'97 workaround for strange hardware
237 See "AC97 Quirk Option" section below.
238 ac97_codec - Workaround to specify which AC'97 codec
239 instead of probing. If this works for you
240 file a bug with your `lspci -vn` output.
241 -2 -- Force probing.
242 -1 -- Default behavior.
243 0-2 -- Use the specified codec.
244 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
246 This module supports one card and autoprobe.
248 ATI IXP has two different methods to control SPDIF output. One is
249 over AC-link and another is over the "direct" SPDIF output. The
250 implementation depends on the motherboard, and you'll need to
251 choose the correct one via spdif_aclink module option.
253 The power-management is supported.
255 Module snd-atiixp-modem
256 -----------------------
258 Module for ATI IXP 150/200/250 AC97 modem controllers.
260 This module supports one card and autoprobe.
262 Note: The default index value of this module is -2, i.e. the first
263 slot is excluded.
265 The power-management is supported.
267 Module snd-au8810, snd-au8820, snd-au8830
268 -----------------------------------------
270 Module for Aureal Vortex, Vortex2 and Advantage device.
272 pcifix - Control PCI workarounds
273 0 = Disable all workarounds
274 1 = Force the PCI latency of the Aureal card to 0xff
275 2 = Force the Extend PCI#2 Internal Master for Efficient
276 Handling of Dummy Requests on the VIA KT133 AGP Bridge
277 3 = Force both settings
278 255 = Autodetect what is required (default)
280 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
281 EQ, mpu401, gameport. A3D and wavetable support are still in development.
282 Development and reverse engineering work is being coordinated at
283 http://savannah.nongnu.org/projects/openvortex/
284 SPDIF output has a copy of the AC97 codec output, unless you use the
285 "spdif" pcm device, which allows raw data passthru.
286 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
287 Advantage.
289 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
290 control correctly. If you have problems regarding this, try
291 another ALSA compliant mixer (alsamixer works).
293 Module snd-aw2
294 --------------
296 Module for Audiowerk2 sound card
298 This module supports multiple cards.
300 Module snd-azt2320
301 ------------------
303 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
305 This module supports multiple cards, PnP and autoprobe.
307 The power-management is supported.
309 Module snd-azt3328
310 ------------------
312 Module for sound cards based on Aztech AZF3328 PCI chip.
314 joystick - Enable joystick (default off)
316 This module supports multiple cards.
318 Module snd-bt87x
319 ----------------
321 Module for video cards based on Bt87x chips.
323 digital_rate - Override the default digital rate (Hz)
324 load_all - Load the driver even if the card model isn't known
326 This module supports multiple cards.
328 Note: The default index value of this module is -2, i.e. the first
329 slot is excluded.
331 Module snd-ca0106
332 -----------------
334 Module for Creative Audigy LS and SB Live 24bit
336 This module supports multiple cards.
339 Module snd-cmi8330
340 ------------------
342 Module for sound cards based on C-Media CMI8330 ISA chips.
344 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
346 with isapnp=0, the following options are available:
348 wssport - port # for CMI8330 chip (WSS)
349 wssirq - IRQ # for CMI8330 chip (WSS)
350 wssdma - first DMA # for CMI8330 chip (WSS)
351 sbport - port # for CMI8330 chip (SB16)
352 sbirq - IRQ # for CMI8330 chip (SB16)
353 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
354 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
355 fmport - (optional) OPL3 I/O port
356 mpuport - (optional) MPU401 I/O port
357 mpuirq - (optional) MPU401 irq #
359 This module supports multiple cards and autoprobe.
361 The power-management is supported.
363 Module snd-cmipci
364 -----------------
366 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
368 mpu_port - port address of MIDI interface (8338 only):
369 0x300,0x310,0x320,0x330 = legacy port,
370 0 = disable (default)
371 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
372 0x388 = legacy port,
373 1 = integrated PCI port (default on 8738),
374 0 = disable
375 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
376 (default = 1)
377 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
379 This module supports autoprobe and multiple cards.
381 The power-management is supported.
383 Module snd-cs4231
384 -----------------
386 Module for sound cards based on CS4231 ISA chips.
388 port - port # for CS4231 chip
389 mpu_port - port # for MPU-401 UART (optional), -1 = disable
390 irq - IRQ # for CS4231 chip
391 mpu_irq - IRQ # for MPU-401 UART
392 dma1 - first DMA # for CS4231 chip
393 dma2 - second DMA # for CS4231 chip
395 This module supports multiple cards. This module does not support autoprobe
396 thus main port must be specified!!! Other ports are optional.
398 The power-management is supported.
400 Module snd-cs4236
401 -----------------
403 Module for sound cards based on CS4232/CS4232A,
404 CS4235/CS4236/CS4236B/CS4237B/
405 CS4238B/CS4239 ISA chips.
407 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
409 with isapnp=0, the following options are available:
411 port - port # for CS4236 chip (PnP setup - 0x534)
412 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
413 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
414 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
415 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
416 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
417 dma1 - first DMA # for CS4236 chip (0,1,3)
418 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
420 This module supports multiple cards. This module does not support autoprobe
421 (if ISA PnP is not used) thus main port and control port must be
422 specified!!! Other ports are optional.
424 The power-management is supported.
426 This module is aliased as snd-cs4232 since it provides the old
427 snd-cs4232 functionality, too.
429 Module snd-cs4281
430 -----------------
432 Module for Cirrus Logic CS4281 soundchip.
434 dual_codec - Secondary codec ID (0 = disable, default)
436 This module supports multiple cards.
438 The power-management is supported.
440 Module snd-cs46xx
441 -----------------
443 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
444 CS4624/CS4630/CS4280 PCI chips.
446 external_amp - Force to enable external amplifier.
447 thinkpad - Force to enable Thinkpad's CLKRUN control.
448 mmap_valid - Support OSS mmap mode (default = 0).
450 This module supports multiple cards and autoprobe.
451 Usually external amp and CLKRUN controls are detected automatically
452 from PCI sub vendor/device ids. If they don't work, give the options
453 above explicitly.
455 The power-management is supported.
457 Module snd-cs5530
458 _________________
460 Module for Cyrix/NatSemi Geode 5530 chip.
462 Module snd-cs5535audio
463 ----------------------
465 Module for multifunction CS5535 companion PCI device
467 The power-management is supported.
469 Module snd-ctxfi
470 ----------------
472 Module for Creative Sound Blaster X-Fi boards (20k1 / 20k2 chips)
473 * Creative Sound Blaster X-Fi Titanium Fatal1ty Champion Series
474 * Creative Sound Blaster X-Fi Titanium Fatal1ty Professional Series
475 * Creative Sound Blaster X-Fi Titanium Professional Audio
476 * Creative Sound Blaster X-Fi Titanium
477 * Creative Sound Blaster X-Fi Elite Pro
478 * Creative Sound Blaster X-Fi Platinum
479 * Creative Sound Blaster X-Fi Fatal1ty
480 * Creative Sound Blaster X-Fi XtremeGamer
481 * Creative Sound Blaster X-Fi XtremeMusic
483 reference_rate - reference sample rate, 44100 or 48000 (default)
484 multiple - multiple to ref. sample rate, 1 or 2 (default)
486 This module supports multiple cards.
488 Module snd-darla20
489 ------------------
491 Module for Echoaudio Darla20
493 This module supports multiple cards.
494 The driver requires the firmware loader support on kernel.
496 Module snd-darla24
497 ------------------
499 Module for Echoaudio Darla24
501 This module supports multiple cards.
502 The driver requires the firmware loader support on kernel.
504 Module snd-dt019x
505 -----------------
507 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
508 only)
510 This module supports multiple cards. This module is enabled only with
511 ISA PnP support.
513 The power-management is supported.
515 Module snd-dummy
516 ----------------
518 Module for the dummy sound card. This "card" doesn't do any output
519 or input, but you may use this module for any application which
520 requires a sound card (like RealPlayer).
522 pcm_devs - Number of PCM devices assigned to each card
523 (default = 1, up to 4)
524 pcm_substreams - Number of PCM substreams assigned to each PCM
525 (default = 8, up to 128)
526 hrtimer - Use hrtimer (=1, default) or system timer (=0)
527 fake_buffer - Fake buffer allocations (default = 1)
529 When multiple PCM devices are created, snd-dummy gives different
530 behavior to each PCM device:
531 0 = interleaved with mmap support
532 1 = non-interleaved with mmap support
533 2 = interleaved without mmap
534 3 = non-interleaved without mmap
536 As default, snd-dummy drivers doesn't allocate the real buffers
537 but either ignores read/write or mmap a single dummy page to all
538 buffer pages, in order to save the resouces. If your apps need
539 the read/ written buffer data to be consistent, pass fake_buffer=0
540 option.
542 The power-management is supported.
544 Module snd-echo3g
545 -----------------
547 Module for Echoaudio 3G cards (Gina3G/Layla3G)
549 This module supports multiple cards.
550 The driver requires the firmware loader support on kernel.
552 Module snd-emu10k1
553 ------------------
555 Module for EMU10K1/EMU10k2 based PCI sound cards.
556 * Sound Blaster Live!
557 * Sound Blaster PCI 512
558 * Emu APS (partially supported)
559 * Sound Blaster Audigy
561 extin - bitmap of available external inputs for FX8010 (see bellow)
562 extout - bitmap of available external outputs for FX8010 (see bellow)
563 seq_ports - allocated sequencer ports (4 by default)
564 max_synth_voices - limit of voices used for wavetable (64 by default)
565 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
566 given in MB unit. Default value is 128.
567 enable_ir - enable IR
569 This module supports multiple cards and autoprobe.
571 Input & Output configurations [extin/extout]
572 * Creative Card wo/Digital out [0x0003/0x1f03]
573 * Creative Card w/Digital out [0x0003/0x1f0f]
574 * Creative Card w/Digital CD in [0x000f/0x1f0f]
575 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
576 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
577 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
578 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
579 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
580 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
581 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
582 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
583 * Creative Card all ins and outs [0x3fff/0x7fff]
585 The power-management is supported.
587 Module snd-emu10k1x
588 -------------------
590 Module for Creative Emu10k1X (SB Live Dell OEM version)
592 This module supports multiple cards.
594 Module snd-ens1370
595 ------------------
597 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
598 * SoundBlaster PCI 64
599 * SoundBlaster PCI 128
601 joystick - Enable joystick (default off)
603 This module supports multiple cards and autoprobe.
605 The power-management is supported.
607 Module snd-ens1371
608 ------------------
610 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
611 * SoundBlaster PCI 64
612 * SoundBlaster PCI 128
613 * SoundBlaster Vibra PCI
615 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
616 0 = disable (default), 1 = auto-detect
618 This module supports multiple cards and autoprobe.
620 The power-management is supported.
622 Module snd-es968
623 ----------------
625 Module for sound cards based on ESS ES968 chip (PnP only).
627 This module supports multiple cards, PnP and autoprobe.
629 The power-management is supported.
631 Module snd-es1688
632 -----------------
634 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
636 port - port # for ES-1688 chip (0x220,0x240,0x260)
637 fm_port - port # for OPL3 (option; share the same port as default)
638 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
639 irq - IRQ # for ES-1688 chip (5,7,9,10)
640 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
641 dma8 - DMA # for ES-1688 chip (0,1,3)
643 This module supports multiple cards and autoprobe (without MPU-401 port).
645 Module snd-es18xx
646 -----------------
648 Module for ESS AudioDrive ES-18xx sound cards.
650 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
652 with isapnp=0, the following options are available:
654 port - port # for ES-18xx chip (0x220,0x240,0x260)
655 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
656 fm_port - port # for FM (optional, not used)
657 irq - IRQ # for ES-18xx chip (5,7,9,10)
658 dma1 - first DMA # for ES-18xx chip (0,1,3)
659 dma2 - first DMA # for ES-18xx chip (0,1,3)
661 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
662 port if native ISA PnP routines are not used).
663 When dma2 is equal with dma1, the driver works as half-duplex.
665 The power-management is supported.
667 Module snd-es1938
668 -----------------
670 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
672 This module supports multiple cards and autoprobe.
674 The power-management is supported.
676 Module snd-es1968
677 -----------------
679 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
681 total_bufsize - total buffer size in kB (1-4096kB)
682 pcm_substreams_p - playback channels (1-8, default=2)
683 pcm_substreams_c - capture channels (1-8, default=0)
684 clock - clock (0 = auto-detection)
685 use_pm - support the power-management (0 = off, 1 = on,
686 2 = auto (default))
687 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
688 joystick - enable joystick (default off)
690 This module supports multiple cards and autoprobe.
692 The power-management is supported.
694 Module snd-fm801
695 ----------------
697 Module for ForteMedia FM801 based PCI sound cards.
699 tea575x_tuner - Enable TEA575x tuner
700 - 1 = MediaForte 256-PCS
701 - 2 = MediaForte 256-PCPR
702 - 3 = MediaForte 64-PCR
703 - High 16-bits are video (radio) device number + 1
704 - example: 0x10002 (MediaForte 256-PCPR, device 1)
706 This module supports multiple cards and autoprobe.
708 The power-management is supported.
710 Module snd-gina20
711 -----------------
713 Module for Echoaudio Gina20
715 This module supports multiple cards.
716 The driver requires the firmware loader support on kernel.
718 Module snd-gina24
719 -----------------
721 Module for Echoaudio Gina24
723 This module supports multiple cards.
724 The driver requires the firmware loader support on kernel.
726 Module snd-gusclassic
727 ---------------------
729 Module for Gravis UltraSound Classic sound card.
731 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
732 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
733 dma1 - DMA # for GF1 chip (1,3,5,6,7)
734 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
735 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
736 voices - GF1 voices limit (14-32)
737 pcm_voices - reserved PCM voices
739 This module supports multiple cards and autoprobe.
741 Module snd-gusextreme
742 ---------------------
744 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
746 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
747 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
748 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
749 irq - IRQ # for ES-1688 chip (5,7,9,10)
750 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
751 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
752 dma8 - DMA # for ES-1688 chip (0,1,3)
753 dma1 - DMA # for GF1 chip (1,3,5,6,7)
754 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
755 voices - GF1 voices limit (14-32)
756 pcm_voices - reserved PCM voices
758 This module supports multiple cards and autoprobe (without MPU-401 port).
760 Module snd-gusmax
761 -----------------
763 Module for Gravis UltraSound MAX sound card.
765 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
766 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
767 dma1 - DMA # for GF1 chip (1,3,5,6,7)
768 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
769 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
770 voices - GF1 voices limit (14-32)
771 pcm_voices - reserved PCM voices
773 This module supports multiple cards and autoprobe.
775 Module snd-hda-intel
776 --------------------
778 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8, ICH9, ICH10,
779 PCH, SCH),
780 ATI SB450, SB600, R600, RS600, RS690, RS780, RV610, RV620,
781 RV630, RV635, RV670, RV770,
782 VIA VT8251/VT8237A,
783 SIS966, ULI M5461
785 [Multiple options for each card instance]
786 model - force the model name
787 position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF)
788 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
789 When the bit 8 (0x100) is set, the lower 8 bits are used
790 as the "fixed" codec slots; i.e. the driver probes the
791 slots regardless what hardware reports back
792 probe_only - Only probing and no codec initialization (default=off);
793 Useful to check the initial codec status for debugging
794 bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.
795 Passing -1 will make the driver to choose the appropriate
796 value based on the controller chip.
797 patch - Specifies the early "patch" files to modify the HD-audio
798 setup before initializing the codecs. This option is
799 available only when CONFIG_SND_HDA_PATCH_LOADER=y is set.
800 See HD-Audio.txt for details.
801 beep_mode - Selects the beep registration mode (0=off, 1=on, 2=
802 dynamic registration via mute switch on/off); the default
803 value is set via CONFIG_SND_HDA_INPUT_BEEP_MODE kconfig.
805 [Single (global) options]
806 single_cmd - Use single immediate commands to communicate with
807 codecs (for debugging only)
808 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
809 power_save - Automatic power-saving timeout (in second, 0 =
810 disable)
811 power_save_controller - Reset HD-audio controller in power-saving mode
812 (default = on)
814 This module supports multiple cards and autoprobe.
816 See Documentation/sound/alsa/HD-Audio.txt for more details about
817 HD-audio driver.
819 Each codec may have a model table for different configurations.
820 If your machine isn't listed there, the default (usually minimal)
821 configuration is set up. You can pass "model=<name>" option to
822 specify a certain model in such a case. There are different
823 models depending on the codec chip. The list of available models
824 is found in HD-Audio-Models.txt
826 The model name "genric" is treated as a special case. When this
827 model is given, the driver uses the generic codec parser without
828 "codec-patch". It's sometimes good for testing and debugging.
830 If the default configuration doesn't work and one of the above
831 matches with your device, report it together with alsa-info.sh
832 output (with --no-upload option) to kernel bugzilla or alsa-devel
833 ML (see the section "Links and Addresses").
835 power_save and power_save_controller options are for power-saving
836 mode. See powersave.txt for details.
838 Note 2: If you get click noises on output, try the module option
839 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
840 register value without FIFO size correction as the current
841 DMA pointer. position_fix=2 will make the driver to use
842 the position buffer instead of reading SD_LPIB register.
843 (Usually SD_LPIB register is more accurate than the
844 position buffer.)
846 NB: If you get many "azx_get_response timeout" messages at
847 loading, it's likely a problem of interrupts (e.g. ACPI irq
848 routing). Try to boot with options like "pci=noacpi". Also, you
849 can try "single_cmd=1" module option. This will switch the
850 communication method between HDA controller and codecs to the
851 single immediate commands instead of CORB/RIRB. Basically, the
852 single command mode is provided only for BIOS, and you won't get
853 unsolicited events, too. But, at least, this works independently
854 from the irq. Remember this is a last resort, and should be
855 avoided as much as possible...
857 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
858 On some hardwares, you may need to add a proper probe_mask option
859 to avoid the "azx_get_response timeout" problem above, instead.
860 This occurs when the access to non-existing or non-working codec slot
861 (likely a modem one) causes a stall of the communication via HD-audio
862 bus. You can see which codec slots are probed by enabling
863 CONFIG_SND_DEBUG_VERBOSE, or simply from the file name of the codec
864 proc files. Then limit the slots to probe by probe_mask option.
865 For example, probe_mask=1 means to probe only the first slot, and
866 probe_mask=4 means only the third slot.
868 The power-management is supported.
870 Module snd-hdsp
871 ---------------
873 Module for RME Hammerfall DSP audio interface(s)
875 This module supports multiple cards.
877 Note: The firmware data can be automatically loaded via hotplug
878 when CONFIG_FW_LOADER is set. Otherwise, you need to load
879 the firmware via hdsploader utility included in alsa-tools
880 package.
881 The firmware data is found in alsa-firmware package.
883 Note: snd-page-alloc module does the job which snd-hammerfall-mem
884 module did formerly. It will allocate the buffers in advance
885 when any HDSP cards are found. To make the buffer
886 allocation sure, load snd-page-alloc module in the early
887 stage of boot sequence. See "Early Buffer Allocation"
888 section.
890 Module snd-hdspm
891 ----------------
893 Module for RME HDSP MADI board.
895 precise_ptr - Enable precise pointer, or disable.
896 line_outs_monitor - Send playback streams to analog outs by default.
897 enable_monitor - Enable Analog Out on Channel 63/64 by default.
899 See hdspm.txt for details.
901 Module snd-hifier
902 -----------------
904 Module for the MediaTek/TempoTec HiFier Fantasia sound card.
906 This module supports autoprobe and multiple cards.
908 Module snd-ice1712
909 ------------------
911 Module for Envy24 (ICE1712) based PCI sound cards.
912 * MidiMan M Audio Delta 1010
913 * MidiMan M Audio Delta 1010LT
914 * MidiMan M Audio Delta DiO 2496
915 * MidiMan M Audio Delta 66
916 * MidiMan M Audio Delta 44
917 * MidiMan M Audio Delta 410
918 * MidiMan M Audio Audiophile 2496
919 * TerraTec EWS 88MT
920 * TerraTec EWS 88D
921 * TerraTec EWX 24/96
922 * TerraTec DMX 6Fire
923 * TerraTec Phase 88
924 * Hoontech SoundTrack DSP 24
925 * Hoontech SoundTrack DSP 24 Value
926 * Hoontech SoundTrack DSP 24 Media 7.1
927 * Event Electronics, EZ8
928 * Digigram VX442
929 * Lionstracs, Mediastaton
930 * Terrasoniq TS 88
932 model - Use the given board model, one of the following:
933 delta1010, dio2496, delta66, delta44, audiophile, delta410,
934 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
935 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
936 phase88, mediastation
937 omni - Omni I/O support for MidiMan M-Audio Delta44/66
938 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
939 in msec resolution, default value is 500 (0.5 sec)
941 This module supports multiple cards and autoprobe. Note: The consumer part
942 is not used with all Envy24 based cards (for example in the MidiMan Delta
943 serie).
945 Note: The supported board is detected by reading EEPROM or PCI
946 SSID (if EEPROM isn't available). You can override the
947 model by passing "model" module option in case that the
948 driver isn't configured properly or you want to try another
949 type for testing.
951 Module snd-ice1724
952 ------------------
954 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
955 * MidiMan M Audio Revolution 5.1
956 * MidiMan M Audio Revolution 7.1
957 * MidiMan M Audio Audiophile 192
958 * AMP Ltd AUDIO2000
959 * TerraTec Aureon 5.1 Sky
960 * TerraTec Aureon 7.1 Space
961 * TerraTec Aureon 7.1 Universe
962 * TerraTec Phase 22
963 * TerraTec Phase 28
964 * AudioTrak Prodigy 7.1
965 * AudioTrak Prodigy 7.1 LT
966 * AudioTrak Prodigy 7.1 XT
967 * AudioTrak Prodigy 7.1 HIFI
968 * AudioTrak Prodigy 7.1 HD2
969 * AudioTrak Prodigy 192
970 * Pontis MS300
971 * Albatron K8X800 Pro II
972 * Chaintech ZNF3-150
973 * Chaintech ZNF3-250
974 * Chaintech 9CJS
975 * Chaintech AV-710
976 * Shuttle SN25P
977 * Onkyo SE-90PCI
978 * Onkyo SE-200PCI
979 * ESI Juli@
980 * ESI Maya44
981 * Hercules Fortissimo IV
982 * EGO-SYS WaveTerminal 192M
984 model - Use the given board model, one of the following:
985 revo51, revo71, amp2000, prodigy71, prodigy71lt,
986 prodigy71xt, prodigy71hifi, prodigyhd2, prodigy192,
987 juli, aureon51, aureon71, universe, ap192, k8x800,
988 phase22, phase28, ms300, av710, se200pci, se90pci,
989 fortissimo4, sn25p, WT192M, maya44
991 This module supports multiple cards and autoprobe.
993 Note: The supported board is detected by reading EEPROM or PCI
994 SSID (if EEPROM isn't available). You can override the
995 model by passing "model" module option in case that the
996 driver isn't configured properly or you want to try another
997 type for testing.
999 Module snd-indigo
1000 -----------------
1002 Module for Echoaudio Indigo
1004 This module supports multiple cards.
1005 The driver requires the firmware loader support on kernel.
1007 Module snd-indigodj
1008 -------------------
1010 Module for Echoaudio Indigo DJ
1012 This module supports multiple cards.
1013 The driver requires the firmware loader support on kernel.
1015 Module snd-indigoio
1016 -------------------
1018 Module for Echoaudio Indigo IO
1020 This module supports multiple cards.
1021 The driver requires the firmware loader support on kernel.
1023 Module snd-intel8x0
1024 -------------------
1026 Module for AC'97 motherboards from Intel and compatibles.
1027 * Intel i810/810E, i815, i820, i830, i84x, MX440
1028 ICH5, ICH6, ICH7, 6300ESB, ESB2
1029 * SiS 7012 (SiS 735)
1030 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1031 CK8, CK8S, MCP501
1032 * AMD AMD768, AMD8111
1033 * ALi m5455
1035 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1036 ac97_quirk - AC'97 workaround for strange hardware
1037 See "AC97 Quirk Option" section below.
1038 buggy_irq - Enable workaround for buggy interrupts on some
1039 motherboards (default yes on nForce chips,
1040 otherwise off)
1041 buggy_semaphore - Enable workaround for hardwares with buggy
1042 semaphores (e.g. on some ASUS laptops)
1043 (default off)
1044 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1045 from the controller chip
1046 (0 = off, 1 = on, -1 = default)
1048 This module supports one chip and autoprobe.
1050 Note: the latest driver supports auto-detection of chip clock.
1051 if you still encounter too fast playback, specify the clock
1052 explicitly via the module option "ac97_clock=41194".
1054 Joystick/MIDI ports are not supported by this driver. If your
1055 motherboard has these devices, use the ns558 or snd-mpu401
1056 modules, respectively.
1058 The power-management is supported.
1060 Module snd-intel8x0m
1061 --------------------
1063 Module for Intel ICH (i8x0) chipset MC97 modems.
1064 * Intel i810/810E, i815, i820, i830, i84x, MX440
1065 ICH5, ICH6, ICH7
1066 * SiS 7013 (SiS 735)
1067 * NVidia NForce, NForce2, NForce2s, NForce3
1068 * AMD AMD8111
1069 * ALi m5455
1071 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1073 This module supports one card and autoprobe.
1075 Note: The default index value of this module is -2, i.e. the first
1076 slot is excluded.
1078 The power-management is supported.
1080 Module snd-interwave
1081 --------------------
1083 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1084 and other sound cards based on AMD InterWave (tm) chip.
1086 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1087 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1088 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1089 effect - 1 = InterWave effects enable (default 0);
1090 requires 8 voices
1091 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1093 with isapnp=0, the following options are available:
1095 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1096 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1097 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1098 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1100 This module supports multiple cards, autoprobe and ISA PnP.
1102 Module snd-interwave-stb
1103 ------------------------
1105 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1106 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1107 circuit for extended control of bass, treble and master volume.
1109 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1110 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1111 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1112 effect - 1 = InterWave effects enable (default 0);
1113 requires 8 voices
1114 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1116 with isapnp=0, the following options are available:
1118 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1119 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1120 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1121 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1122 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1124 This module supports multiple cards, autoprobe and ISA PnP.
1126 Module snd-korg1212
1127 -------------------
1129 Module for Korg 1212 IO PCI card
1131 This module supports multiple cards.
1133 Module snd-layla20
1134 ------------------
1136 Module for Echoaudio Layla20
1138 This module supports multiple cards.
1139 The driver requires the firmware loader support on kernel.
1141 Module snd-layla24
1142 ------------------
1144 Module for Echoaudio Layla24
1146 This module supports multiple cards.
1147 The driver requires the firmware loader support on kernel.
1149 Module snd-lx6464es
1150 -------------------
1152 Module for Digigram LX6464ES boards
1154 This module supports multiple cards.
1156 Module snd-maestro3
1157 -------------------
1159 Module for Allegro/Maestro3 chips
1161 external_amp - enable external amp (enabled by default)
1162 amp_gpio - GPIO pin number for external amp (0-15) or
1163 -1 for default pin (8 for allegro, 1 for
1164 others)
1166 This module supports autoprobe and multiple chips.
1168 Note: the binding of amplifier is dependent on hardware.
1169 If there is no sound even though all channels are unmuted, try to
1170 specify other gpio connection via amp_gpio option.
1171 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1172 option.
1174 The power-management is supported.
1176 Module snd-mia
1177 ---------------
1179 Module for Echoaudio Mia
1181 This module supports multiple cards.
1182 The driver requires the firmware loader support on kernel.
1184 Module snd-miro
1185 ---------------
1187 Module for Miro soundcards: miroSOUND PCM 1 pro,
1188 miroSOUND PCM 12,
1189 miroSOUND PCM 20 Radio.
1191 port - Port # (0x530,0x604,0xe80,0xf40)
1192 irq - IRQ # (5,7,9,10,11)
1193 dma1 - 1st dma # (0,1,3)
1194 dma2 - 2nd dma # (0,1)
1195 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1196 mpu_irq - MPU-401 irq # (5,7,9,10)
1197 fm_port - FM Port # (0x388)
1198 wss - enable WSS mode
1199 ide - enable onboard ide support
1201 Module snd-mixart
1202 -----------------
1204 Module for Digigram miXart8 sound cards.
1206 This module supports multiple cards.
1207 Note: One miXart8 board will be represented as 4 alsa cards.
1208 See MIXART.txt for details.
1210 When the driver is compiled as a module and the hotplug firmware
1211 is supported, the firmware data is loaded via hotplug automatically.
1212 Install the necessary firmware files in alsa-firmware package.
1213 When no hotplug fw loader is available, you need to load the
1214 firmware via mixartloader utility in alsa-tools package.
1216 Module snd-mona
1217 ---------------
1219 Module for Echoaudio Mona
1221 This module supports multiple cards.
1222 The driver requires the firmware loader support on kernel.
1224 Module snd-mpu401
1225 -----------------
1227 Module for MPU-401 UART devices.
1229 port - port number or -1 (disable)
1230 irq - IRQ number or -1 (disable)
1231 pnp - PnP detection - 0 = disable, 1 = enable (default)
1233 This module supports multiple devices and PnP.
1235 Module snd-msnd-classic
1236 -----------------------
1238 Module for Turtle Beach MultiSound Classic, Tahiti or Monterey
1239 soundcards.
1241 io - Port # for msnd-classic card
1242 irq - IRQ # for msnd-classic card
1243 mem - Memory address (0xb0000, 0xc8000, 0xd0000, 0xd8000,
1244 0xe0000 or 0xe8000)
1245 write_ndelay - enable write ndelay (default = 1)
1246 calibrate_signal - calibrate signal (default = 0)
1247 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1248 digital - Digital daughterboard present (default = 0)
1249 cfg - Config port (0x250, 0x260 or 0x270) default = PnP
1250 reset - Reset all devices
1251 mpu_io - MPU401 I/O port
1252 mpu_irq - MPU401 irq#
1253 ide_io0 - IDE port #0
1254 ide_io1 - IDE port #1
1255 ide_irq - IDE irq#
1256 joystick_io - Joystick I/O port
1258 The driver requires firmware files "turtlebeach/msndinit.bin" and
1259 "turtlebeach/msndperm.bin" in the proper firmware directory.
1261 See Documentation/sound/oss/MultiSound for important information
1262 about this driver. Note that it has been discontinued, but the
1263 Voyetra Turtle Beach knowledge base entry for it is still available
1264 at
1265 http://www.turtlebeach.com/site/kb_ftp/790.asp
1267 Module snd-msnd-pinnacle
1268 ------------------------
1270 Module for Turtle Beach MultiSound Pinnacle/Fiji soundcards.
1272 io - Port # for pinnacle/fiji card
1273 irq - IRQ # for pinnalce/fiji card
1274 mem - Memory address (0xb0000, 0xc8000, 0xd0000, 0xd8000,
1275 0xe0000 or 0xe8000)
1276 write_ndelay - enable write ndelay (default = 1)
1277 calibrate_signal - calibrate signal (default = 0)
1278 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1280 The driver requires firmware files "turtlebeach/pndspini.bin" and
1281 "turtlebeach/pndsperm.bin" in the proper firmware directory.
1283 Module snd-mtpav
1284 ----------------
1286 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1287 port).
1289 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1290 irq - IRQ # for MTPAV (7,5, default=7)
1291 hwports - number of supported hardware ports, default=8.
1293 Module supports only 1 card. This module has no enable option.
1295 Module snd-mts64
1296 ----------------
1298 Module for Ego Systems (ESI) Miditerminal 4140
1300 This module supports multiple devices.
1301 Requires parport (CONFIG_PARPORT).
1303 Module snd-nm256
1304 ----------------
1306 Module for NeoMagic NM256AV/ZX chips
1308 playback_bufsize - max playback frame size in kB (4-128kB)
1309 capture_bufsize - max capture frame size in kB (4-128kB)
1310 force_ac97 - 0 or 1 (disabled by default)
1311 buffer_top - specify buffer top address
1312 use_cache - 0 or 1 (disabled by default)
1313 vaio_hack - alias buffer_top=0x25a800
1314 reset_workaround - enable AC97 RESET workaround for some laptops
1315 reset_workaround2 - enable extended AC97 RESET workaround for some
1316 other laptops
1318 This module supports one chip and autoprobe.
1320 The power-management is supported.
1322 Note: on some notebooks the buffer address cannot be detected
1323 automatically, or causes hang-up during initialization.
1324 In such a case, specify the buffer top address explicitly via
1325 the buffer_top option.
1326 For example,
1327 Sony F250: buffer_top=0x25a800
1328 Sony F270: buffer_top=0x272800
1329 The driver supports only ac97 codec. It's possible to force
1330 to initialize/use ac97 although it's not detected. In such a
1331 case, use force_ac97=1 option - but *NO* guarantee whether it
1332 works!
1334 Note: The NM256 chip can be linked internally with non-AC97
1335 codecs. This driver supports only the AC97 codec, and won't work
1336 with machines with other (most likely CS423x or OPL3SAx) chips,
1337 even though the device is detected in lspci. In such a case, try
1338 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1339 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1340 and proper hardware parameters in the case without ISA PnP.
1342 Note: some laptops need a workaround for AC97 RESET. For the
1343 known hardware like Dell Latitude LS and Sony PCG-F305, this
1344 workaround is enabled automatically. For other laptops with a
1345 hard freeze, you can try reset_workaround=1 option.
1347 Note: Dell Latitude CSx laptops have another problem regarding
1348 AC97 RESET. On these laptops, reset_workaround2 option is
1349 turned on as default. This option is worth to try if the
1350 previous reset_workaround option doesn't help.
1352 Note: This driver is really crappy. It's a porting from the
1353 OSS driver, which is a result of black-magic reverse engineering.
1354 The detection of codec will fail if the driver is loaded *after*
1355 X-server as described above. You might be able to force to load
1356 the module, but it may result in hang-up. Hence, make sure that
1357 you load this module *before* X if you encounter this kind of
1358 problem.
1360 Module snd-opl3sa2
1361 ------------------
1363 Module for Yamaha OPL3-SA2/SA3 sound cards.
1365 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1367 with isapnp=0, the following options are available:
1369 port - control port # for OPL3-SA chip (0x370)
1370 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1371 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1372 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1373 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1374 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1375 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1376 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1378 This module supports multiple cards and ISA PnP. It does not support
1379 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1381 The power-management is supported.
1383 Module snd-opti92x-ad1848
1384 -------------------------
1386 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1387 Module works with OAK Mozart cards as well.
1389 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1391 with isapnp=0, the following options are available:
1393 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1394 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1395 fm_port - port # for OPL3 device (0x388)
1396 irq - IRQ # for WSS chip (5,7,9,10,11)
1397 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1398 dma1 - first DMA # for WSS chip (0,1,3)
1400 This module supports only one card, autoprobe and PnP.
1402 Module snd-opti92x-cs4231
1403 -------------------------
1405 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1407 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1409 with isapnp=0, the following options are available:
1411 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1412 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1413 fm_port - port # for OPL3 device (0x388)
1414 irq - IRQ # for WSS chip (5,7,9,10,11)
1415 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1416 dma1 - first DMA # for WSS chip (0,1,3)
1417 dma2 - second DMA # for WSS chip (0,1,3)
1419 This module supports only one card, autoprobe and PnP.
1421 Module snd-opti93x
1422 ------------------
1424 Module for sound cards based on OPTi 82c93x chips.
1426 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1428 with isapnp=0, the following options are available:
1430 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1431 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1432 fm_port - port # for OPL3 device (0x388)
1433 irq - IRQ # for WSS chip (5,7,9,10,11)
1434 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1435 dma1 - first DMA # for WSS chip (0,1,3)
1436 dma2 - second DMA # for WSS chip (0,1,3)
1438 This module supports only one card, autoprobe and PnP.
1440 Module snd-oxygen
1441 -----------------
1443 Module for sound cards based on the C-Media CMI8788 chip:
1444 * Asound A-8788
1445 * AuzenTech X-Meridian
1446 * Bgears b-Enspirer
1447 * Club3D Theatron DTS
1448 * HT-Omega Claro (plus)
1449 * HT-Omega Claro halo (XT)
1450 * Razer Barracuda AC-1
1451 * Sondigo Inferno
1453 This module supports autoprobe and multiple cards.
1455 Module snd-pcsp
1456 -----------------
1458 Module for internal PC-Speaker.
1460 nopcm - Disable PC-Speaker PCM sound. Only beeps remain.
1461 nforce_wa - enable NForce chipset workaround. Expect bad sound.
1463 This module supports system beeps, some kind of PCM playback and
1464 even a few mixer controls.
1466 Module snd-pcxhr
1467 ----------------
1469 Module for Digigram PCXHR boards
1471 This module supports multiple cards.
1473 Module snd-portman2x4
1474 ---------------------
1476 Module for Midiman Portman 2x4 parallel port MIDI interface
1478 This module supports multiple cards.
1480 Module snd-powermac (on ppc only)
1481 ---------------------------------
1483 Module for PowerMac, iMac and iBook on-board soundchips
1485 enable_beep - enable beep using PCM (enabled as default)
1487 Module supports autoprobe a chip.
1489 Note: the driver may have problems regarding endianess.
1491 The power-management is supported.
1493 Module snd-pxa2xx-ac97 (on arm only)
1494 ------------------------------------
1496 Module for AC97 driver for the Intel PXA2xx chip
1498 For ARM architecture only.
1500 The power-management is supported.
1502 Module snd-riptide
1503 ------------------
1505 Module for Conexant Riptide chip
1507 joystick_port - Joystick port # (default: 0x200)
1508 mpu_port - MPU401 port # (default: 0x330)
1509 opl3_port - OPL3 port # (default: 0x388)
1511 This module supports multiple cards.
1512 The driver requires the firmware loader support on kernel.
1513 You need to install the firmware file "riptide.hex" to the standard
1514 firmware path (e.g. /lib/firmware).
1516 Module snd-rme32
1517 ----------------
1519 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1520 Prodif96 and Prodif Gold) sound cards.
1522 This module supports multiple cards.
1524 Module snd-rme96
1525 ----------------
1527 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1529 This module supports multiple cards.
1531 Module snd-rme9652
1532 ------------------
1534 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1536 precise_ptr - Enable precise pointer (doesn't work reliably).
1537 (default = 0)
1539 This module supports multiple cards.
1541 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1542 module did formerly. It will allocate the buffers in advance
1543 when any RME9652 cards are found. To make the buffer
1544 allocation sure, load snd-page-alloc module in the early
1545 stage of boot sequence. See "Early Buffer Allocation"
1546 section.
1548 Module snd-sa11xx-uda1341 (on arm only)
1549 ---------------------------------------
1551 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1553 Module supports only one card.
1554 Module has no enable and index options.
1556 The power-management is supported.
1558 Module snd-sb8
1559 --------------
1561 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1562 SoundBlaster 2.0,
1563 SoundBlaster Pro
1565 port - port # for SB DSP chip (0x220,0x240,0x260)
1566 irq - IRQ # for SB DSP chip (5,7,9,10)
1567 dma8 - DMA # for SB DSP chip (1,3)
1569 This module supports multiple cards and autoprobe.
1571 The power-management is supported.
1573 Module snd-sb16 and snd-sbawe
1574 -----------------------------
1576 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1577 SoundBlaster AWE 32 (PnP),
1578 SoundBlaster AWE 64 PnP
1580 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1581 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1582 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1584 with isapnp=0, the following options are available:
1586 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1587 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1588 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1589 (snd-sbawe module only)
1590 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1591 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1592 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1594 This module supports multiple cards, autoprobe and ISA PnP.
1596 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1597 disable 16bit DMA with dma16 = -1 module parameter.
1598 Also, all Sound Blaster 16 type cards can operate in 16-bit
1599 half duplex mode through 8-bit DMA channel by disabling their
1600 16-bit DMA channel.
1602 The power-management is supported.
1604 Module snd-sc6000
1605 -----------------
1607 Module for Gallant SC-6000 soundcard and later models: SC-6600
1608 and SC-7000.
1610 port - Port # (0x220 or 0x240)
1611 mss_port - MSS Port # (0x530 or 0xe80)
1612 irq - IRQ # (5,7,9,10,11)
1613 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1614 dma - DMA # (1,3,0)
1615 joystick - Enable gameport - 0 = disable (default), 1 = enable
1617 This module supports multiple cards.
1619 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1621 Module snd-sgalaxy
1622 ------------------
1624 Module for Aztech Sound Galaxy sound card.
1626 sbport - Port # for SB16 interface (0x220,0x240)
1627 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1628 irq - IRQ # (7,9,10,11)
1629 dma1 - DMA #
1631 This module supports multiple cards.
1633 The power-management is supported.
1635 Module snd-sscape
1636 -----------------
1638 Module for ENSONIQ SoundScape cards.
1640 port - Port # (PnP setup)
1641 wss_port - WSS Port # (PnP setup)
1642 irq - IRQ # (PnP setup)
1643 mpu_irq - MPU-401 IRQ # (PnP setup)
1644 dma - DMA # (PnP setup)
1645 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1646 joystick - Enable gameport - 0 = disable (default), 1 = enable
1648 This module supports multiple cards.
1650 The driver requires the firmware loader support on kernel.
1652 Module snd-sun-amd7930 (on sparc only)
1653 --------------------------------------
1655 Module for AMD7930 sound chips found on Sparcs.
1657 This module supports multiple cards.
1659 Module snd-sun-cs4231 (on sparc only)
1660 -------------------------------------
1662 Module for CS4231 sound chips found on Sparcs.
1664 This module supports multiple cards.
1666 Module snd-sun-dbri (on sparc only)
1667 -----------------------------------
1669 Module for DBRI sound chips found on Sparcs.
1671 This module supports multiple cards.
1673 Module snd-wavefront
1674 --------------------
1676 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1678 use_cs4232_midi - Use CS4232 MPU-401 interface
1679 (inaccessibly located inside your computer)
1680 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1682 with isapnp=0, the following options are available:
1684 cs4232_pcm_port - Port # for CS4232 PCM interface.
1685 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1686 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1687 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1688 ics2115_port - Port # for ICS2115
1689 ics2115_irq - IRQ # for ICS2115
1690 fm_port - FM OPL-3 Port #
1691 dma1 - DMA1 # for CS4232 PCM interface.
1692 dma2 - DMA2 # for CS4232 PCM interface.
1694 The below are options for wavefront_synth features:
1695 wf_raw - Assume that we need to boot the OS (default:no)
1696 If yes, then during driver loading, the state of the board is
1697 ignored, and we reset the board and load the firmware anyway.
1698 fx_raw - Assume that the FX process needs help (default:yes)
1699 If false, we'll leave the FX processor in whatever state it is
1700 when the driver is loaded. The default is to download the
1701 microprogram and associated coefficients to set it up for
1702 "default" operation, whatever that means.
1703 debug_default - Debug parameters for card initialization
1704 wait_usecs - How long to wait without sleeping, usecs
1705 (default:150)
1706 This magic number seems to give pretty optimal throughput
1707 based on my limited experimentation.
1708 If you want to play around with it and find a better value, be
1709 my guest. Remember, the idea is to get a number that causes us
1710 to just busy wait for as many WaveFront commands as possible,
1711 without coming up with a number so large that we hog the whole
1712 CPU.
1713 Specifically, with this number, out of about 134,000 status
1714 waits, only about 250 result in a sleep.
1715 sleep_interval - How long to sleep when waiting for reply
1716 (default: 100)
1717 sleep_tries - How many times to try sleeping during a wait
1718 (default: 50)
1719 ospath - Pathname to processed ICS2115 OS firmware
1720 (default:wavefront.os)
1721 The path name of the ISC2115 OS firmware. In the recent
1722 version, it's handled via firmware loader framework, so it
1723 must be installed in the proper path, typically,
1724 /lib/firmware.
1725 reset_time - How long to wait for a reset to take effect
1726 (default:2)
1727 ramcheck_time - How many seconds to wait for the RAM test
1728 (default:20)
1729 osrun_time - How many seconds to wait for the ICS2115 OS
1730 (default:10)
1732 This module supports multiple cards and ISA PnP.
1734 Note: the firmware file "wavefront.os" was located in the earlier
1735 version in /etc. Now it's loaded via firmware loader, and
1736 must be in the proper firmware path, such as /lib/firmware.
1737 Copy (or symlink) the file appropriately if you get an error
1738 regarding firmware downloading after upgrading the kernel.
1740 Module snd-sonicvibes
1741 ---------------------
1743 Module for S3 SonicVibes PCI sound cards.
1744 * PINE Schubert 32 PCI
1746 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1747 - SoundCard must have onboard SRAM for this.
1748 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1750 This module supports multiple cards and autoprobe.
1752 Module snd-serial-u16550
1753 ------------------------
1755 Module for UART16550A serial MIDI ports.
1757 port - port # for UART16550A chip
1758 irq - IRQ # for UART16550A chip, -1 = poll mode
1759 speed - speed in bauds (9600,19200,38400,57600,115200)
1760 38400 = default
1761 base - base for divisor in bauds (57600,115200,230400,460800)
1762 115200 = default
1763 outs - number of MIDI ports in a serial port (1-4)
1764 1 = default
1765 adaptor - Type of adaptor.
1766 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1767 3 = MS-124W M/B, 4 = Generic
1769 This module supports multiple cards. This module does not support autoprobe
1770 thus the main port must be specified!!! Other options are optional.
1772 Module snd-trident
1773 ------------------
1775 Module for Trident 4DWave DX/NX sound cards.
1776 * Best Union Miss Melody 4DWave PCI
1777 * HIS 4DWave PCI
1778 * Warpspeed ONSpeed 4DWave PCI
1779 * AzTech PCI 64-Q3D
1780 * Addonics SV 750
1781 * CHIC True Sound 4Dwave
1782 * Shark Predator4D-PCI
1783 * Jaton SonicWave 4D
1784 * SiS SI7018 PCI Audio
1785 * Hoontech SoundTrack Digital 4DWave NX
1787 pcm_channels - max channels (voices) reserved for PCM
1788 wavetable_size - max wavetable size in kB (4-?kb)
1790 This module supports multiple cards and autoprobe.
1792 The power-management is supported.
1794 Module snd-usb-audio
1795 --------------------
1797 Module for USB audio and USB MIDI devices.
1799 vid - Vendor ID for the device (optional)
1800 pid - Product ID for the device (optional)
1801 nrpacks - Max. number of packets per URB (default: 8)
1802 async_unlink - Use async unlink mode (default: yes)
1803 device_setup - Device specific magic number (optional)
1804 - Influence depends on the device
1805 - Default: 0x0000
1806 ignore_ctl_error - Ignore any USB-controller regarding mixer
1807 interface (default: no)
1809 This module supports multiple devices, autoprobe and hotplugging.
1811 NB: nrpacks parameter can be modified dynamically via sysfs.
1812 Don't put the value over 20. Changing via sysfs has no sanity
1813 check.
1814 NB: async_unlink=0 would cause Oops. It remains just for
1815 debugging purpose (if any).
1816 NB: ignore_ctl_error=1 may help when you get an error at accessing
1817 the mixer element such as URB error -22. This happens on some
1818 buggy USB device or the controller.
1820 Module snd-usb-caiaq
1821 --------------------
1823 Module for caiaq UB audio interfaces,
1824 * Native Instruments RigKontrol2
1825 * Native Instruments Kore Controller
1826 * Native Instruments Audio Kontrol 1
1827 * Native Instruments Audio 8 DJ
1829 This module supports multiple devices, autoprobe and hotplugging.
1831 Module snd-usb-usx2y
1832 --------------------
1834 Module for Tascam USB US-122, US-224 and US-428 devices.
1836 This module supports multiple devices, autoprobe and hotplugging.
1838 Note: you need to load the firmware via usx2yloader utility included
1839 in alsa-tools and alsa-firmware packages.
1841 Module snd-via82xx
1842 ------------------
1844 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1845 8233A, 8233C, 8235, 8237 (south) bridge.
1847 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1848 [VIA686A/686B only]
1849 joystick - Enable joystick (default off) [VIA686A/686B only]
1850 ac97_clock - AC'97 codec clock base (default 48000Hz)
1851 dxs_support - support DXS channels,
1852 0 = auto (default), 1 = enable, 2 = disable,
1853 3 = 48k only, 4 = no VRA, 5 = enable any sample
1854 rate and different sample rates on different
1855 channels
1856 [VIA8233/C, 8235, 8237 only]
1857 ac97_quirk - AC'97 workaround for strange hardware
1858 See "AC97 Quirk Option" section below.
1860 This module supports one chip and autoprobe.
1862 Note: on some SMP motherboards like MSI 694D the interrupts might
1863 not be generated properly. In such a case, please try to
1864 set the SMP (or MPS) version on BIOS to 1.1 instead of
1865 default value 1.4. Then the interrupt number will be
1866 assigned under 15. You might also upgrade your BIOS.
1868 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1869 channels as the first PCM. On these channels, up to 4
1870 streams can be played at the same time, and the controller
1871 can perform sample rate conversion with separate rates for
1872 each channel.
1873 As default (dxs_support = 0), 48k fixed rate is chosen
1874 except for the known devices since the output is often
1875 noisy except for 48k on some mother boards due to the
1876 bug of BIOS.
1877 Please try once dxs_support=5 and if it works on other
1878 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1879 know the PCI subsystem vendor/device id's (output of
1880 "lspci -nv").
1881 If dxs_support=5 does not work, try dxs_support=4; if it
1882 doesn't work too, try dxs_support=1. (dxs_support=1 is
1883 usually for old motherboards. The correct implemented
1884 board should work with 4 or 5.) If it still doesn't
1885 work and the default setting is ok, dxs_support=3 is the
1886 right choice. If the default setting doesn't work at all,
1887 try dxs_support=2 to disable the DXS channels.
1888 In any cases, please let us know the result and the
1889 subsystem vendor/device ids. See "Links and Addresses"
1890 below.
1892 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1893 additionally. The mpu_port option is for VIA686 chips only.
1895 The power-management is supported.
1897 Module snd-via82xx-modem
1898 ------------------------
1900 Module for VIA82xx AC97 modem
1902 ac97_clock - AC'97 codec clock base (default 48000Hz)
1904 This module supports one card and autoprobe.
1906 Note: The default index value of this module is -2, i.e. the first
1907 slot is excluded.
1909 The power-management is supported.
1911 Module snd-virmidi
1912 ------------------
1914 Module for virtual rawmidi devices.
1915 This module creates virtual rawmidi devices which communicate
1916 to the corresponding ALSA sequencer ports.
1918 midi_devs - MIDI devices # (1-4, default=4)
1920 This module supports multiple cards.
1922 Module snd-virtuoso
1923 -------------------
1925 Module for sound cards based on the Asus AV100/AV200 chips,
1926 i.e., Xonar D1, DX, D2, D2X, HDAV1.3 (Deluxe), Essence ST
1927 (Deluxe) and Essence STX.
1929 This module supports autoprobe and multiple cards.
1931 Module snd-vx222
1932 ----------------
1934 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1936 mic - Enable Microphone on V222 Mic (NYI)
1937 ibl - Capture IBL size. (default = 0, minimum size)
1939 This module supports multiple cards.
1941 When the driver is compiled as a module and the hotplug firmware
1942 is supported, the firmware data is loaded via hotplug automatically.
1943 Install the necessary firmware files in alsa-firmware package.
1944 When no hotplug fw loader is available, you need to load the
1945 firmware via vxloader utility in alsa-tools package. To invoke
1946 vxloader automatically, add the following to /etc/modprobe.conf
1948 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1950 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1951 /etc/modules.conf, instead.)
1952 IBL size defines the interrupts period for PCM. The smaller size
1953 gives smaller latency but leads to more CPU consumption, too.
1954 The size is usually aligned to 126. As default (=0), the smallest
1955 size is chosen. The possible IBL values can be found in
1956 /proc/asound/cardX/vx-status proc file.
1958 The power-management is supported.
1960 Module snd-vxpocket
1961 -------------------
1963 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1965 ibl - Capture IBL size. (default = 0, minimum size)
1967 This module supports multiple cards. The module is compiled only when
1968 PCMCIA is supported on kernel.
1970 With the older 2.6.x kernel, to activate the driver via the card
1971 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1972 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1973 longer require a config file.
1975 When the driver is compiled as a module and the hotplug firmware
1976 is supported, the firmware data is loaded via hotplug automatically.
1977 Install the necessary firmware files in alsa-firmware package.
1978 When no hotplug fw loader is available, you need to load the
1979 firmware via vxloader utility in alsa-tools package.
1981 About capture IBL, see the description of snd-vx222 module.
1983 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
1984 ALSA 1.0.10.
1986 The power-management is supported.
1988 Module snd-ymfpci
1989 -----------------
1991 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1993 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1994 1 (auto-detect for YMF744/754 only)
1995 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1996 1 (auto-detect for YMF744/754 only)
1997 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1998 1 (auto-detect)
1999 rear_switch - enable shared rear/line-in switch (bool)
2001 This module supports autoprobe and multiple chips.
2003 The power-management is supported.
2005 Module snd-pdaudiocf
2006 --------------------
2008 Module for Sound Core PDAudioCF sound card.
2010 The power-management is supported.
2013 AC97 Quirk Option
2014 =================
2016 The ac97_quirk option is used to enable/override the workaround for
2017 specific devices on drivers for on-board AC'97 controllers like
2018 snd-intel8x0. Some hardware have swapped output pins between Master
2019 and Headphone, or Surround (thanks to confusion of AC'97
2020 specifications from version to version :-)
2022 The driver provides the auto-detection of known problematic devices,
2023 but some might be unknown or wrongly detected. In such a case, pass
2024 the proper value with this option.
2026 The following strings are accepted:
2027 - default Don't override the default setting
2028 - none Disable the quirk
2029 - hp_only Bind Master and Headphone controls as a single control
2030 - swap_hp Swap headphone and master controls
2031 - swap_surround Swap master and surround controls
2032 - ad_sharing For AD1985, turn on OMS bit and use headphone
2033 - alc_jack For ALC65x, turn on the jack sense mode
2034 - inv_eapd Inverted EAPD implementation
2035 - mute_led Bind EAPD bit for turning on/off mute LED
2037 For backward compatibility, the corresponding integer value -1, 0,
2038 ... are accepted, too.
2040 For example, if "Master" volume control has no effect on your device
2041 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2044 Configuring Non-ISAPNP Cards
2045 ============================
2047 When the kernel is configured with ISA-PnP support, the modules
2048 supporting the isapnp cards will have module options "isapnp".
2049 If this option is set, *only* the ISA-PnP devices will be probed.
2050 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2051 together with the proper i/o and irq configuration.
2053 When the kernel is configured without ISA-PnP support, isapnp option
2054 will be not built in.
2057 Module Autoloading Support
2058 ==========================
2060 The ALSA drivers can be loaded automatically on demand by defining
2061 module aliases. The string 'snd-card-%1' is requested for ALSA native
2062 devices where %i is sound card number from zero to seven.
2064 To auto-load an ALSA driver for OSS services, define the string
2065 'sound-slot-%i' where %i means the slot number for OSS, which
2066 corresponds to the card index of ALSA. Usually, define this
2067 as the same card module.
2069 An example configuration for a single emu10k1 card is like below:
2070 ----- /etc/modprobe.conf
2071 alias snd-card-0 snd-emu10k1
2072 alias sound-slot-0 snd-emu10k1
2073 ----- /etc/modprobe.conf
2075 The available number of auto-loaded sound cards depends on the module
2076 option "cards_limit" of snd module. As default it's set to 1.
2077 To enable the auto-loading of multiple cards, specify the number of
2078 sound cards in that option.
2080 When multiple cards are available, it'd better to specify the index
2081 number for each card via module option, too, so that the order of
2082 cards is kept consistent.
2084 An example configuration for two sound cards is like below:
2086 ----- /etc/modprobe.conf
2087 # ALSA portion
2088 options snd cards_limit=2
2089 alias snd-card-0 snd-interwave
2090 alias snd-card-1 snd-ens1371
2091 options snd-interwave index=0
2092 options snd-ens1371 index=1
2093 # OSS/Free portion
2094 alias sound-slot-0 snd-interwave
2095 alias sound-slot-1 snd-ens1371
2096 ----- /etc/modprobe.conf
2098 In this example, the interwave card is always loaded as the first card
2099 (index 0) and ens1371 as the second (index 1).
2101 Alternative (and new) way to fixate the slot assignment is to use
2102 "slots" option of snd module. In the case above, specify like the
2103 following:
2105 options snd slots=snd-interwave,snd-ens1371
2107 Then, the first slot (#0) is reserved for snd-interwave driver, and
2108 the second (#1) for snd-ens1371. You can omit index option in each
2109 driver if slots option is used (although you can still have them at
2110 the same time as long as they don't conflict).
2112 The slots option is especially useful for avoiding the possible
2113 hot-plugging and the resultant slot conflict. For example, in the
2114 case above again, the first two slots are already reserved. If any
2115 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2116 snd-ens1371, it will be assigned to the third or later slot.
2118 When a module name is given with '!', the slot will be given for any
2119 modules but that name. For example, "slots=!snd-pcsp" will reserve
2120 the first slot for any modules but snd-pcsp.
2123 ALSA PCM devices to OSS devices mapping
2124 =======================================
2126 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2127 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2128 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2129 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2130 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2131 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2132 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2133 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2134 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2136 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2137 sound card number and second means device number. The ALSA devices
2138 have either 'c' or 'p' suffix indicating the direction, capture and
2139 playback, respectively.
2141 Please note that the device mapping above may be varied via the module
2142 options of snd-pcm-oss module.
2145 Proc interfaces (/proc/asound)
2146 ==============================
2148 /proc/asound/card#/pcm#[cp]/oss
2149 -------------------------------
2150 String "erase" - erase all additional informations about OSS applications
2151 String "<app_name> <fragments> <fragment_size> [<options>]"
2153 <app_name> - name of application with (higher priority) or without path
2154 <fragments> - number of fragments or zero if auto
2155 <fragment_size> - size of fragment in bytes or zero if auto
2156 <options> - optional parameters
2157 - disable the application tries to open a pcm device for
2158 this channel but does not want to use it.
2159 (Cause a bug or mmap needs)
2160 It's good for Quake etc...
2161 - direct don't use plugins
2162 - block force block mode (rvplayer)
2163 - non-block force non-block mode
2164 - whole-frag write only whole fragments (optimization affecting
2165 playback only)
2166 - no-silence do not fill silence ahead to avoid clicks
2167 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2168 instead of filled blocks
2170 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2171 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2172 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2175 Early Buffer Allocation
2176 =======================
2178 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2179 sometimes it's too late to find such spaces when the driver module is
2180 actually loaded due to memory fragmentation. You can pre-allocate the
2181 PCM buffers by loading snd-page-alloc module and write commands to its
2182 proc file in prior, for example, in the early boot stage like
2183 /etc/init.d/*.local scripts.
2185 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2186 usage of page allocation. In writing, you can send the following
2187 commands to the snd-page-alloc driver:
2189 - add VENDOR DEVICE MASK SIZE BUFFERS
2191 VENDOR and DEVICE are PCI vendor and device IDs. They take
2192 integer numbers (0x prefix is needed for the hex).
2193 MASK is the PCI DMA mask. Pass 0 if not restricted.
2194 SIZE is the size of each buffer to allocate. You can pass
2195 k and m suffix for KB and MB. The max number is 16MB.
2196 BUFFERS is the number of buffers to allocate. It must be greater
2197 than 0. The max number is 4.
2199 - erase
2201 This will erase the all pre-allocated buffers which are not in
2202 use.
2205 Links and Addresses
2206 ===================
2208 ALSA project homepage
2209 http://www.alsa-project.org
2211 Kernel Bugzilla
2212 http://bugzilla.kernel.org/
2214 ALSA Developers ML
2215 mailto:alsa-devel@alsa-project.org
2217 alsa-info.sh script
2218 http://www.alsa-project.org/alsa-info.sh