| blob | d18e12bf7d03209d7d1bbfad0a7bf14efcbd7b6f |
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.
62 Module snd-pcm-oss
63 ------------------
65 The PCM OSS emulation module.
66 This module takes options which change the mapping of devices.
68 dsp_map - PCM device number maps assigned to the 1st OSS device.
69 - Default: 0
70 adsp_map - PCM device number maps assigned to the 2st OSS device.
71 - Default: 1
72 nonblock_open
73 - Don't block opening busy PCM devices. Default: 1
75 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
76 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
77 to PCM #0 of the card #0.
78 For changing the second or later card, specify the option with
79 commas, such like "dsp_map=0,1".
81 nonblock_open option is used to change the behavior of the PCM
82 regarding opening the device. When this option is non-zero,
83 opening a busy OSS PCM device won't be blocked but return
84 immediately with EAGAIN (just like O_NONBLOCK flag).
86 Module snd-rawmidi
87 ------------------
89 This module takes options which change the mapping of devices.
90 similar to those of the snd-pcm-oss module.
92 midi_map - MIDI device number maps assigned to the 1st OSS device.
93 - Default: 0
94 amidi_map - MIDI device number maps assigned to the 2st OSS device.
95 - Default: 1
97 Common parameters for top sound card modules
98 --------------------------------------------
100 Each of top level sound card module takes the following options.
102 index - index (slot #) of sound card
103 - Values: 0 through 31 or negative
104 - If nonnegative, assign that index number
105 - if negative, interpret as a bitmask of permissible
106 indices; the first free permitted index is assigned
107 - Default: -1
108 id - card ID (identifier or name)
109 - Can be up to 15 characters long
110 - Default: the card type
111 - A directory by this name is created under /proc/asound/
112 containing information about the card
113 - This ID can be used instead of the index number in
114 identifying the card
115 enable - enable card
116 - Default: enabled, for PCI and ISA PnP cards
118 Module snd-adlib
119 ----------------
121 Module for AdLib FM cards.
123 port - port # for OPL chip
125 This module supports multiple cards. It does not support autoprobe, so
126 the port must be specified. For actual AdLib FM cards it will be 0x388.
127 Note that this card does not have PCM support and no mixer; only FM
128 synthesis.
130 Make sure you have "sbiload" from the alsa-tools package available and,
131 after loading the module, find out the assigned ALSA sequencer port
132 number through "sbiload -l". Example output:
134 Port Client name Port name
135 64:0 OPL2 FM synth OPL2 FM Port
137 Load the std.sb and drums.sb patches also supplied by sbiload:
139 sbiload -p 64:0 std.sb drums.sb
141 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
142 instead. To have the card produce sound, use aplaymidi from alsa-utils:
144 aplaymidi -p 64:0 foo.mid
146 Module snd-ad1816a
147 ------------------
149 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
151 port - port # for AD1816A chip (PnP setup)
152 mpu_port - port # for MPU-401 UART (PnP setup)
153 fm_port - port # for OPL3 (PnP setup)
154 irq - IRQ # for AD1816A chip (PnP setup)
155 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
156 dma1 - first DMA # for AD1816A chip (PnP setup)
157 dma2 - second DMA # for AD1816A chip (PnP setup)
158 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
160 This module supports multiple cards, autoprobe and PnP.
162 Module snd-ad1848
163 -----------------
165 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
167 port - port # for AD1848 chip
168 irq - IRQ # for AD1848 chip
169 dma1 - DMA # for AD1848 chip (0,1,3)
171 This module supports multiple cards. It does not support autoprobe
172 thus main port must be specified!!! Other ports are optional.
174 The power-management is supported.
176 Module snd-ad1889
177 -----------------
179 Module for Analog Devices AD1889 chips.
181 ac97_quirk - AC'97 workaround for strange hardware
182 See the description of intel8x0 module for details.
184 This module supports multiple cards.
186 Module snd-ali5451
187 ------------------
189 Module for ALi M5451 PCI chip.
191 pcm_channels - Number of hardware channels assigned for PCM
192 spdif - Support SPDIF I/O
193 - Default: disabled
195 This module supports one chip and autoprobe.
197 The power-management is supported.
199 Module snd-als100
200 -----------------
202 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
204 port - port # for ALS100 (SB16) chip (PnP setup)
205 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
206 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
207 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
208 mpu_port - port # for MPU-401 UART (PnP setup)
209 mpu_irq - IRQ # for MPU-401 (PnP setup)
210 fm_port - port # for OPL3 FM (PnP setup)
212 This module supports multiple cards, autoprobe and PnP.
214 The power-management is supported.
216 Module snd-als300
217 -----------------
219 Module for Avance Logic ALS300 and ALS300+
221 This module supports multiple cards.
223 The power-management is supported.
225 Module snd-als4000
226 ------------------
228 Module for sound cards based on Avance Logic ALS4000 PCI chip.
230 joystick_port - port # for legacy joystick support.
231 0 = disabled (default), 1 = auto-detect
233 This module supports multiple cards, autoprobe and PnP.
235 The power-management is supported.
237 Module snd-atiixp
238 -----------------
240 Module for ATI IXP 150/200/250/400 AC97 controllers.
242 ac97_clock - AC'97 clock (default = 48000)
243 ac97_quirk - AC'97 workaround for strange hardware
244 See "AC97 Quirk Option" section below.
245 ac97_codec - Workaround to specify which AC'97 codec
246 instead of probing. If this works for you
247 file a bug with your `lspci -vn` output.
248 -2 -- Force probing.
249 -1 -- Default behavior.
250 0-2 -- Use the specified codec.
251 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
253 This module supports one card and autoprobe.
255 ATI IXP has two different methods to control SPDIF output. One is
256 over AC-link and another is over the "direct" SPDIF output. The
257 implementation depends on the motherboard, and you'll need to
258 choose the correct one via spdif_aclink module option.
260 The power-management is supported.
262 Module snd-atiixp-modem
263 -----------------------
265 Module for ATI IXP 150/200/250 AC97 modem controllers.
267 This module supports one card and autoprobe.
269 Note: The default index value of this module is -2, i.e. the first
270 slot is excluded.
272 The power-management is supported.
274 Module snd-au8810, snd-au8820, snd-au8830
275 -----------------------------------------
277 Module for Aureal Vortex, Vortex2 and Advantage device.
279 pcifix - Control PCI workarounds
280 0 = Disable all workarounds
281 1 = Force the PCI latency of the Aureal card to 0xff
282 2 = Force the Extend PCI#2 Internal Master for Efficient
283 Handling of Dummy Requests on the VIA KT133 AGP Bridge
284 3 = Force both settings
285 255 = Autodetect what is required (default)
287 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
288 EQ, mpu401, gameport. A3D and wavetable support are still in development.
289 Development and reverse engineering work is being coordinated at
290 http://savannah.nongnu.org/projects/openvortex/
291 SPDIF output has a copy of the AC97 codec output, unless you use the
292 "spdif" pcm device, which allows raw data passthru.
293 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
294 Advantage.
296 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
297 control correctly. If you have problems regarding this, try
298 another ALSA compliant mixer (alsamixer works).
300 Module snd-azt2320
301 ------------------
303 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
305 port - port # for AZT2320 chip (PnP setup)
306 wss_port - port # for WSS (PnP setup)
307 mpu_port - port # for MPU-401 UART (PnP setup)
308 fm_port - FM port # for AZT2320 chip (PnP setup)
309 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
310 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
311 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
312 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
314 This module supports multiple cards, PnP and autoprobe.
316 The power-management is supported.
318 Module snd-azt3328
319 ------------------
321 Module for sound cards based on Aztech AZF3328 PCI chip.
323 joystick - Enable joystick (default off)
325 This module supports multiple cards.
327 Module snd-bt87x
328 ----------------
330 Module for video cards based on Bt87x chips.
332 digital_rate - Override the default digital rate (Hz)
333 load_all - Load the driver even if the card model isn't known
335 This module supports multiple cards.
337 Note: The default index value of this module is -2, i.e. the first
338 slot is excluded.
340 Module snd-ca0106
341 -----------------
343 Module for Creative Audigy LS and SB Live 24bit
345 This module supports multiple cards.
348 Module snd-cmi8330
349 ------------------
351 Module for sound cards based on C-Media CMI8330 ISA chips.
353 wssport - port # for CMI8330 chip (WSS)
354 wssirq - IRQ # for CMI8330 chip (WSS)
355 wssdma - first DMA # for CMI8330 chip (WSS)
356 sbport - port # for CMI8330 chip (SB16)
357 sbirq - IRQ # for CMI8330 chip (SB16)
358 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
359 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
361 This module supports multiple cards and autoprobe.
363 The power-management is supported.
365 Module snd-cmipci
366 -----------------
368 Module for C-Media CMI8338 and 8738 PCI sound cards.
370 mpu_port - 0x300,0x310,0x320,0x330 = legacy port,
371 1 = integrated PCI port,
372 0 = disable (default)
373 fm_port - 0x388 = legacy port,
374 1 = integrated PCI port (default),
375 0 = disable
376 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
377 (default = 1)
378 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
380 This module supports autoprobe and multiple cards.
382 The power-management is supported.
384 Module snd-cs4231
385 -----------------
387 Module for sound cards based on CS4231 ISA chips.
389 port - port # for CS4231 chip
390 mpu_port - port # for MPU-401 UART (optional), -1 = disable
391 irq - IRQ # for CS4231 chip
392 mpu_irq - IRQ # for MPU-401 UART
393 dma1 - first DMA # for CS4231 chip
394 dma2 - second DMA # for CS4231 chip
396 This module supports multiple cards. This module does not support autoprobe
397 thus main port must be specified!!! Other ports are optional.
399 The power-management is supported.
401 Module snd-cs4232
402 -----------------
404 Module for sound cards based on CS4232/CS4232A ISA chips.
406 port - port # for CS4232 chip (PnP setup - 0x534)
407 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
408 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
409 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
410 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
411 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
412 dma1 - first DMA # for CS4232 chip (0,1,3)
413 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
414 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
416 This module supports multiple cards. This module does not support autoprobe
417 thus main port must be specified!!! Other ports are optional.
419 The power-management is supported.
421 Module snd-cs4236
422 -----------------
424 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
425 CS4238B/CS4239 ISA chips.
427 port - port # for CS4236 chip (PnP setup - 0x534)
428 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
429 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
430 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
431 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
432 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
433 dma1 - first DMA # for CS4236 chip (0,1,3)
434 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
435 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
437 This module supports multiple cards. This module does not support autoprobe
438 (if ISA PnP is not used) thus main port and control port must be
439 specified!!! Other ports are optional.
441 The power-management is supported.
443 Module snd-cs4281
444 -----------------
446 Module for Cirrus Logic CS4281 soundchip.
448 dual_codec - Secondary codec ID (0 = disable, default)
450 This module supports multiple cards.
452 The power-management is supported.
454 Module snd-cs46xx
455 -----------------
457 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
458 CS4624/CS4630/CS4280 PCI chips.
460 external_amp - Force to enable external amplifier.
461 thinkpad - Force to enable Thinkpad's CLKRUN control.
462 mmap_valid - Support OSS mmap mode (default = 0).
464 This module supports multiple cards and autoprobe.
465 Usually external amp and CLKRUN controls are detected automatically
466 from PCI sub vendor/device ids. If they don't work, give the options
467 above explicitly.
469 The power-management is supported.
471 Module snd-cs5535audio
472 ----------------------
474 Module for multifunction CS5535 companion PCI device
476 The power-management is supported.
478 Module snd-darla20
479 ------------------
481 Module for Echoaudio Darla20
483 This module supports multiple cards.
484 The driver requires the firmware loader support on kernel.
486 Module snd-darla24
487 ------------------
489 Module for Echoaudio Darla24
491 This module supports multiple cards.
492 The driver requires the firmware loader support on kernel.
494 Module snd-dt019x
495 -----------------
497 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
498 only)
500 port - Port # (PnP setup)
501 mpu_port - Port # for MPU-401 (PnP setup)
502 fm_port - Port # for FM OPL-3 (PnP setup)
503 irq - IRQ # (PnP setup)
504 mpu_irq - IRQ # for MPU-401 (PnP setup)
505 dma8 - DMA # (PnP setup)
507 This module supports multiple cards. This module is enabled only with
508 ISA PnP support.
510 The power-management is supported.
512 Module snd-dummy
513 ----------------
515 Module for the dummy sound card. This "card" doesn't do any output
516 or input, but you may use this module for any application which
517 requires a sound card (like RealPlayer).
519 The power-management is supported.
521 Module snd-echo3g
522 -----------------
524 Module for Echoaudio 3G cards (Gina3G/Layla3G)
526 This module supports multiple cards.
527 The driver requires the firmware loader support on kernel.
529 Module snd-emu10k1
530 ------------------
532 Module for EMU10K1/EMU10k2 based PCI sound cards.
533 * Sound Blaster Live!
534 * Sound Blaster PCI 512
535 * Emu APS (partially supported)
536 * Sound Blaster Audigy
538 extin - bitmap of available external inputs for FX8010 (see bellow)
539 extout - bitmap of available external outputs for FX8010 (see bellow)
540 seq_ports - allocated sequencer ports (4 by default)
541 max_synth_voices - limit of voices used for wavetable (64 by default)
542 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
543 given in MB unit. Default value is 128.
544 enable_ir - enable IR
546 This module supports multiple cards and autoprobe.
548 Input & Output configurations [extin/extout]
549 * Creative Card wo/Digital out [0x0003/0x1f03]
550 * Creative Card w/Digital out [0x0003/0x1f0f]
551 * Creative Card w/Digital CD in [0x000f/0x1f0f]
552 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
553 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
554 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
555 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
556 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
557 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
558 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
559 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
560 * Creative Card all ins and outs [0x3fff/0x7fff]
562 The power-management is supported.
564 Module snd-emu10k1x
565 -------------------
567 Module for Creative Emu10k1X (SB Live Dell OEM version)
569 This module supports multiple cards.
571 Module snd-ens1370
572 ------------------
574 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
575 * SoundBlaster PCI 64
576 * SoundBlaster PCI 128
578 joystick - Enable joystick (default off)
580 This module supports multiple cards and autoprobe.
582 The power-management is supported.
584 Module snd-ens1371
585 ------------------
587 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
588 * SoundBlaster PCI 64
589 * SoundBlaster PCI 128
590 * SoundBlaster Vibra PCI
592 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
593 0 = disable (default), 1 = auto-detect
595 This module supports multiple cards and autoprobe.
597 The power-management is supported.
599 Module snd-es968
600 ----------------
602 Module for sound cards based on ESS ES968 chip (PnP only).
604 port - port # for ES968 (SB8) chip (PnP setup)
605 irq - IRQ # for ES968 (SB8) chip (PnP setup)
606 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
608 This module supports multiple cards, PnP and autoprobe.
610 The power-management is supported.
612 Module snd-es1688
613 -----------------
615 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
617 port - port # for ES-1688 chip (0x220,0x240,0x260)
618 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
619 irq - IRQ # for ES-1688 chip (5,7,9,10)
620 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
621 dma8 - DMA # for ES-1688 chip (0,1,3)
623 This module supports multiple cards and autoprobe (without MPU-401 port).
625 Module snd-es18xx
626 -----------------
628 Module for ESS AudioDrive ES-18xx sound cards.
630 port - port # for ES-18xx chip (0x220,0x240,0x260)
631 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
632 fm_port - port # for FM (optional, not used)
633 irq - IRQ # for ES-18xx chip (5,7,9,10)
634 dma1 - first DMA # for ES-18xx chip (0,1,3)
635 dma2 - first DMA # for ES-18xx chip (0,1,3)
636 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
638 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
639 port if native ISA PnP routines are not used).
640 When dma2 is equal with dma1, the driver works as half-duplex.
642 The power-management is supported.
644 Module snd-es1938
645 -----------------
647 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
649 This module supports multiple cards and autoprobe.
651 The power-management is supported.
653 Module snd-es1968
654 -----------------
656 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
658 total_bufsize - total buffer size in kB (1-4096kB)
659 pcm_substreams_p - playback channels (1-8, default=2)
660 pcm_substreams_c - capture channels (1-8, default=0)
661 clock - clock (0 = auto-detection)
662 use_pm - support the power-management (0 = off, 1 = on,
663 2 = auto (default))
664 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
665 joystick - enable joystick (default off)
667 This module supports multiple cards and autoprobe.
669 The power-management is supported.
671 Module snd-fm801
672 ----------------
674 Module for ForteMedia FM801 based PCI sound cards.
676 tea575x_tuner - Enable TEA575x tuner
677 - 1 = MediaForte 256-PCS
678 - 2 = MediaForte 256-PCPR
679 - 3 = MediaForte 64-PCR
680 - High 16-bits are video (radio) device number + 1
681 - example: 0x10002 (MediaForte 256-PCPR, device 1)
683 This module supports multiple cards and autoprobe.
685 The power-management is supported.
687 Module snd-gina20
688 -----------------
690 Module for Echoaudio Gina20
692 This module supports multiple cards.
693 The driver requires the firmware loader support on kernel.
695 Module snd-gina24
696 -----------------
698 Module for Echoaudio Gina24
700 This module supports multiple cards.
701 The driver requires the firmware loader support on kernel.
703 Module snd-gusclassic
704 ---------------------
706 Module for Gravis UltraSound Classic sound card.
708 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
709 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
710 dma1 - DMA # for GF1 chip (1,3,5,6,7)
711 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
712 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
713 voices - GF1 voices limit (14-32)
714 pcm_voices - reserved PCM voices
716 This module supports multiple cards and autoprobe.
718 Module snd-gusextreme
719 ---------------------
721 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
723 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
724 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
725 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
726 irq - IRQ # for ES-1688 chip (5,7,9,10)
727 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
728 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
729 dma8 - DMA # for ES-1688 chip (0,1,3)
730 dma1 - DMA # for GF1 chip (1,3,5,6,7)
731 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
732 voices - GF1 voices limit (14-32)
733 pcm_voices - reserved PCM voices
735 This module supports multiple cards and autoprobe (without MPU-401 port).
737 Module snd-gusmax
738 -----------------
740 Module for Gravis UltraSound MAX sound card.
742 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
743 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
744 dma1 - DMA # for GF1 chip (1,3,5,6,7)
745 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
746 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
747 voices - GF1 voices limit (14-32)
748 pcm_voices - reserved PCM voices
750 This module supports multiple cards and autoprobe.
752 Module snd-hda-intel
753 --------------------
755 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
756 ATI SB450, SB600, RS600,
757 VIA VT8251/VT8237A,
758 SIS966, ULI M5461
760 model - force the model name
761 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
762 single_cmd - Use single immediate commands to communicate with
763 codecs (for debugging only)
764 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
766 This module supports one card and autoprobe.
768 Each codec may have a model table for different configurations.
769 If your machine isn't listed there, the default (usually minimal)
770 configuration is set up. You can pass "model=<name>" option to
771 specify a certain model in such a case. There are different
772 models depending on the codec chip.
774 Model name Description
775 ---------- -----------
776 ALC880
777 3stack 3-jack in back and a headphone out
778 3stack-digout 3-jack in back, a HP out and a SPDIF out
779 5stack 5-jack in back, 2-jack in front
780 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
781 6stack 6-jack in back, 2-jack in front
782 6stack-digout 6-jack with a SPDIF out
783 w810 3-jack
784 z71v 3-jack (HP shared SPDIF)
785 asus 3-jack (ASUS Mobo)
786 asus-w1v ASUS W1V
787 asus-dig ASUS with SPDIF out
788 asus-dig2 ASUS with SPDIF out (using GPIO2)
789 uniwill 3-jack
790 fujitsu Fujitsu Laptops (Pi1536)
791 F1734 2-jack
792 lg LG laptop (m1 express dual)
793 lg-lw LG LW20/LW25 laptop
794 tcl TCL S700
795 clevo Clevo laptops (m520G, m665n)
796 test for testing/debugging purpose, almost all controls can be
797 adjusted. Appearing only when compiled with
798 $CONFIG_SND_DEBUG=y
799 auto auto-config reading BIOS (default)
801 ALC260
802 hp HP machines
803 hp-3013 HP machines (3013-variant)
804 fujitsu Fujitsu S7020
805 acer Acer TravelMate
806 basic fixed pin assignment (old default model)
807 auto auto-config reading BIOS (default)
809 ALC262
810 fujitsu Fujitsu Laptop
811 hp-bpc HP xw4400/6400/8400/9400 laptops
812 hp-bpc-d7000 HP BPC D7000
813 benq Benq ED8
814 hippo Hippo (ATI) with jack detection, Sony UX-90s
815 hippo_1 Hippo (Benq) with jack detection
816 basic fixed pin assignment w/o SPDIF
817 auto auto-config reading BIOS (default)
819 ALC882/885
820 3stack-dig 3-jack with SPDIF I/O
821 6stack-dig 6-jack digital with SPDIF I/O
822 arima Arima W820Di1
823 macpro MacPro support
824 auto auto-config reading BIOS (default)
826 ALC883/888
827 3stack-dig 3-jack with SPDIF I/O
828 6stack-dig 6-jack digital with SPDIF I/O
829 3stack-6ch 3-jack 6-channel
830 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
831 6stack-dig-demo 6-jack digital for Intel demo board
832 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
833 medion Medion Laptops
834 targa-dig Targa/MSI
835 targa-2ch-dig Targs/MSI with 2-channel
836 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
837 auto auto-config reading BIOS (default)
839 ALC861/660
840 3stack 3-jack
841 3stack-dig 3-jack with SPDIF I/O
842 6stack-dig 6-jack with SPDIF I/O
843 3stack-660 3-jack (for ALC660)
844 uniwill-m31 Uniwill M31 laptop
845 toshiba Toshiba laptop support
846 asus Asus laptop support
847 asus-laptop ASUS F2/F3 laptops
848 auto auto-config reading BIOS (default)
850 ALC861VD/660VD
851 3stack 3-jack
852 3stack-dig 3-jack with SPDIF OUT
853 6stack-dig 6-jack with SPDIF OUT
854 3stack-660 3-jack (for ALC660VD)
855 auto auto-config reading BIOS (default)
857 CMI9880
858 minimal 3-jack in back
859 min_fp 3-jack in back, 2-jack in front
860 full 6-jack in back, 2-jack in front
861 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
862 allout 5-jack in back, 2-jack in front, SPDIF out
863 auto auto-config reading BIOS (default)
865 AD1981
866 basic 3-jack (default)
867 hp HP nx6320
868 thinkpad Lenovo Thinkpad T60/X60/Z60
869 toshiba Toshiba U205
871 AD1986A
872 6stack 6-jack, separate surrounds (default)
873 3stack 3-stack, shared surrounds
874 laptop 2-channel only (FSC V2060, Samsung M50)
875 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
876 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
878 AD1988
879 6stack 6-jack
880 6stack-dig ditto with SPDIF
881 3stack 3-jack
882 3stack-dig ditto with SPDIF
883 laptop 3-jack with hp-jack automute
884 laptop-dig ditto with SPDIF
885 auto auto-config reading BIOS (default)
887 Conexant 5045
888 laptop Laptop config
889 test for testing/debugging purpose, almost all controls
890 can be adjusted. Appearing only when compiled with
891 $CONFIG_SND_DEBUG=y
893 Conexant 5047
894 laptop Basic Laptop config
895 laptop-hp Laptop config for some HP models (subdevice 30A5)
896 laptop-eapd Laptop config with EAPD support
897 test for testing/debugging purpose, almost all controls
898 can be adjusted. Appearing only when compiled with
899 $CONFIG_SND_DEBUG=y
901 STAC9200/9205/9254
902 ref Reference board
904 STAC9220/9221
905 ref Reference board
906 3stack D945 3stack
907 5stack D945 5stack + SPDIF
908 macmini Intel Mac Mini
909 macbook Intel Mac Book
910 macbook-pro-v1 Intel Mac Book Pro 1st generation
911 macbook-pro Intel Mac Book Pro 2nd generation
912 imac-intel Intel iMac
914 STAC9202/9250/9251
915 ref Reference board, base config
916 m2-2 Some Gateway MX series laptops
917 m6 Some Gateway NX series laptops
919 STAC9227/9228/9229/927x
920 ref Reference board
921 3stack D965 3stack
922 5stack D965 5stack + SPDIF
924 STAC9872
925 vaio Setup for VAIO FE550G/SZ110
926 vaio-ar Setup for VAIO AR
928 The model name "genric" is treated as a special case. When this
929 model is given, the driver uses the generic codec parser without
930 "codec-patch". It's sometimes good for testing and debugging.
932 If the default configuration doesn't work and one of the above
933 matches with your device, report it together with the PCI
934 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
935 ML (see the section "Links and Addresses").
937 Note 2: If you get click noises on output, try the module option
938 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
939 register value without FIFO size correction as the current
940 DMA pointer. position_fix=2 will make the driver to use
941 the position buffer instead of reading SD_LPIB register.
942 (Usually SD_LPLIB register is more accurate than the
943 position buffer.)
945 NB: If you get many "azx_get_response timeout" messages at
946 loading, it's likely a problem of interrupts (e.g. ACPI irq
947 routing). Try to boot with options like "pci=noacpi". Also, you
948 can try "single_cmd=1" module option. This will switch the
949 communication method between HDA controller and codecs to the
950 single immediate commands instead of CORB/RIRB. Basically, the
951 single command mode is provided only for BIOS, and you won't get
952 unsolicited events, too. But, at least, this works independently
953 from the irq. Remember this is a last resort, and should be
954 avoided as much as possible...
956 The power-management is supported.
958 Module snd-hdsp
959 ---------------
961 Module for RME Hammerfall DSP audio interface(s)
963 This module supports multiple cards.
965 Note: The firmware data can be automatically loaded via hotplug
966 when CONFIG_FW_LOADER is set. Otherwise, you need to load
967 the firmware via hdsploader utility included in alsa-tools
968 package.
969 The firmware data is found in alsa-firmware package.
971 Note: snd-page-alloc module does the job which snd-hammerfall-mem
972 module did formerly. It will allocate the buffers in advance
973 when any HDSP cards are found. To make the buffer
974 allocation sure, load snd-page-alloc module in the early
975 stage of boot sequence. See "Early Buffer Allocation"
976 section.
978 Module snd-hdspm
979 ----------------
981 Module for RME HDSP MADI board.
983 precise_ptr - Enable precise pointer, or disable.
984 line_outs_monitor - Send playback streams to analog outs by default.
985 enable_monitor - Enable Analog Out on Channel 63/64 by default.
987 See hdspm.txt for details.
989 Module snd-ice1712
990 ------------------
992 Module for Envy24 (ICE1712) based PCI sound cards.
993 * MidiMan M Audio Delta 1010
994 * MidiMan M Audio Delta 1010LT
995 * MidiMan M Audio Delta DiO 2496
996 * MidiMan M Audio Delta 66
997 * MidiMan M Audio Delta 44
998 * MidiMan M Audio Delta 410
999 * MidiMan M Audio Audiophile 2496
1000 * TerraTec EWS 88MT
1001 * TerraTec EWS 88D
1002 * TerraTec EWX 24/96
1003 * TerraTec DMX 6Fire
1004 * TerraTec Phase 88
1005 * Hoontech SoundTrack DSP 24
1006 * Hoontech SoundTrack DSP 24 Value
1007 * Hoontech SoundTrack DSP 24 Media 7.1
1008 * Event Electronics, EZ8
1009 * Digigram VX442
1010 * Lionstracs, Mediastaton
1012 model - Use the given board model, one of the following:
1013 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1014 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1015 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1016 phase88, mediastation
1017 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1018 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1019 in msec resolution, default value is 500 (0.5 sec)
1021 This module supports multiple cards and autoprobe. Note: The consumer part
1022 is not used with all Envy24 based cards (for example in the MidiMan Delta
1023 serie).
1025 Note: The supported board is detected by reading EEPROM or PCI
1026 SSID (if EEPROM isn't available). You can override the
1027 model by passing "model" module option in case that the
1028 driver isn't configured properly or you want to try another
1029 type for testing.
1031 Module snd-ice1724
1032 ------------------
1034 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1035 * MidiMan M Audio Revolution 5.1
1036 * MidiMan M Audio Revolution 7.1
1037 * MidiMan M Audio Audiophile 192
1038 * AMP Ltd AUDIO2000
1039 * TerraTec Aureon 5.1 Sky
1040 * TerraTec Aureon 7.1 Space
1041 * TerraTec Aureon 7.1 Universe
1042 * TerraTec Phase 22
1043 * TerraTec Phase 28
1044 * AudioTrak Prodigy 7.1
1045 * AudioTrak Prodigy 7.1LT
1046 * AudioTrak Prodigy 192
1047 * Pontis MS300
1048 * Albatron K8X800 Pro II
1049 * Chaintech ZNF3-150
1050 * Chaintech ZNF3-250
1051 * Chaintech 9CJS
1052 * Chaintech AV-710
1053 * Shuttle SN25P
1055 model - Use the given board model, one of the following:
1056 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1057 prodigy192, aureon51, aureon71, universe, ap192,
1058 k8x800, phase22, phase28, ms300, av710
1060 This module supports multiple cards and autoprobe.
1062 Note: The supported board is detected by reading EEPROM or PCI
1063 SSID (if EEPROM isn't available). You can override the
1064 model by passing "model" module option in case that the
1065 driver isn't configured properly or you want to try another
1066 type for testing.
1068 Module snd-indigo
1069 -----------------
1071 Module for Echoaudio Indigo
1073 This module supports multiple cards.
1074 The driver requires the firmware loader support on kernel.
1076 Module snd-indigodj
1077 -------------------
1079 Module for Echoaudio Indigo DJ
1081 This module supports multiple cards.
1082 The driver requires the firmware loader support on kernel.
1084 Module snd-indigoio
1085 -------------------
1087 Module for Echoaudio Indigo IO
1089 This module supports multiple cards.
1090 The driver requires the firmware loader support on kernel.
1092 Module snd-intel8x0
1093 -------------------
1095 Module for AC'97 motherboards from Intel and compatibles.
1096 * Intel i810/810E, i815, i820, i830, i84x, MX440
1097 ICH5, ICH6, ICH7, ESB2
1098 * SiS 7012 (SiS 735)
1099 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1100 CK8, CK8S, MCP501
1101 * AMD AMD768, AMD8111
1102 * ALi m5455
1104 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1105 ac97_quirk - AC'97 workaround for strange hardware
1106 See "AC97 Quirk Option" section below.
1107 buggy_irq - Enable workaround for buggy interrupts on some
1108 motherboards (default yes on nForce chips,
1109 otherwise off)
1110 buggy_semaphore - Enable workaround for hardwares with buggy
1111 semaphores (e.g. on some ASUS laptops)
1112 (default off)
1113 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1114 from the controller chip
1115 (0 = off, 1 = on, -1 = default)
1117 This module supports one chip and autoprobe.
1119 Note: the latest driver supports auto-detection of chip clock.
1120 if you still encounter too fast playback, specify the clock
1121 explicitly via the module option "ac97_clock=41194".
1123 Joystick/MIDI ports are not supported by this driver. If your
1124 motherboard has these devices, use the ns558 or snd-mpu401
1125 modules, respectively.
1127 The power-management is supported.
1129 Module snd-intel8x0m
1130 --------------------
1132 Module for Intel ICH (i8x0) chipset MC97 modems.
1133 * Intel i810/810E, i815, i820, i830, i84x, MX440
1134 ICH5, ICH6, ICH7
1135 * SiS 7013 (SiS 735)
1136 * NVidia NForce, NForce2, NForce2s, NForce3
1137 * AMD AMD8111
1138 * ALi m5455
1140 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1142 This module supports one card and autoprobe.
1144 Note: The default index value of this module is -2, i.e. the first
1145 slot is excluded.
1147 The power-management is supported.
1149 Module snd-interwave
1150 --------------------
1152 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1153 and other sound cards based on AMD InterWave (tm) chip.
1155 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1156 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1157 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1158 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1159 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1160 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1161 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1162 effect - 1 = InterWave effects enable (default 0);
1163 requires 8 voices
1165 This module supports multiple cards, autoprobe and ISA PnP.
1167 Module snd-interwave-stb
1168 ------------------------
1170 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1171 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1172 circuit for extended control of bass, treble and master volume.
1174 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1175 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1176 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1177 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1178 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1179 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1180 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1181 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1182 effect - 1 = InterWave effects enable (default 0);
1183 requires 8 voices
1185 This module supports multiple cards, autoprobe and ISA PnP.
1187 Module snd-korg1212
1188 -------------------
1190 Module for Korg 1212 IO PCI card
1192 This module supports multiple cards.
1194 Module snd-layla20
1195 ------------------
1197 Module for Echoaudio Layla20
1199 This module supports multiple cards.
1200 The driver requires the firmware loader support on kernel.
1202 Module snd-layla24
1203 ------------------
1205 Module for Echoaudio Layla24
1207 This module supports multiple cards.
1208 The driver requires the firmware loader support on kernel.
1210 Module snd-maestro3
1211 -------------------
1213 Module for Allegro/Maestro3 chips
1215 external_amp - enable external amp (enabled by default)
1216 amp_gpio - GPIO pin number for external amp (0-15) or
1217 -1 for default pin (8 for allegro, 1 for
1218 others)
1220 This module supports autoprobe and multiple chips.
1222 Note: the binding of amplifier is dependent on hardware.
1223 If there is no sound even though all channels are unmuted, try to
1224 specify other gpio connection via amp_gpio option.
1225 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1226 option.
1228 The power-management is supported.
1230 Module snd-mia
1231 ---------------
1233 Module for Echoaudio Mia
1235 This module supports multiple cards.
1236 The driver requires the firmware loader support on kernel.
1238 Module snd-miro
1239 ---------------
1241 Module for Miro soundcards: miroSOUND PCM 1 pro,
1242 miroSOUND PCM 12,
1243 miroSOUND PCM 20 Radio.
1245 port - Port # (0x530,0x604,0xe80,0xf40)
1246 irq - IRQ # (5,7,9,10,11)
1247 dma1 - 1st dma # (0,1,3)
1248 dma2 - 2nd dma # (0,1)
1249 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1250 mpu_irq - MPU-401 irq # (5,7,9,10)
1251 fm_port - FM Port # (0x388)
1252 wss - enable WSS mode
1253 ide - enable onboard ide support
1255 Module snd-mixart
1256 -----------------
1258 Module for Digigram miXart8 sound cards.
1260 This module supports multiple cards.
1261 Note: One miXart8 board will be represented as 4 alsa cards.
1262 See MIXART.txt for details.
1264 When the driver is compiled as a module and the hotplug firmware
1265 is supported, the firmware data is loaded via hotplug automatically.
1266 Install the necessary firmware files in alsa-firmware package.
1267 When no hotplug fw loader is available, you need to load the
1268 firmware via mixartloader utility in alsa-tools package.
1270 Module snd-mona
1271 ---------------
1273 Module for Echoaudio Mona
1275 This module supports multiple cards.
1276 The driver requires the firmware loader support on kernel.
1278 Module snd-mpu401
1279 -----------------
1281 Module for MPU-401 UART devices.
1283 port - port number or -1 (disable)
1284 irq - IRQ number or -1 (disable)
1285 pnp - PnP detection - 0 = disable, 1 = enable (default)
1286 uart_enter - Issue UART_ENTER command at open - bool, default = on
1288 This module supports multiple devices and PnP.
1290 Module snd-mtpav
1291 ----------------
1293 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1294 port).
1296 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1297 irq - IRQ # for MTPAV (7,5, default=7)
1298 hwports - number of supported hardware ports, default=8.
1300 Module supports only 1 card. This module has no enable option.
1302 Module snd-mts64
1303 ----------------
1305 Module for Ego Systems (ESI) Miditerminal 4140
1307 This module supports multiple devices.
1308 Requires parport (CONFIG_PARPORT).
1310 Module snd-nm256
1311 ----------------
1313 Module for NeoMagic NM256AV/ZX chips
1315 playback_bufsize - max playback frame size in kB (4-128kB)
1316 capture_bufsize - max capture frame size in kB (4-128kB)
1317 force_ac97 - 0 or 1 (disabled by default)
1318 buffer_top - specify buffer top address
1319 use_cache - 0 or 1 (disabled by default)
1320 vaio_hack - alias buffer_top=0x25a800
1321 reset_workaround - enable AC97 RESET workaround for some laptops
1322 reset_workaround2 - enable extended AC97 RESET workaround for some
1323 other laptops
1325 This module supports one chip and autoprobe.
1327 The power-management is supported.
1329 Note: on some notebooks the buffer address cannot be detected
1330 automatically, or causes hang-up during initialization.
1331 In such a case, specify the buffer top address explicitly via
1332 the buffer_top option.
1333 For example,
1334 Sony F250: buffer_top=0x25a800
1335 Sony F270: buffer_top=0x272800
1336 The driver supports only ac97 codec. It's possible to force
1337 to initialize/use ac97 although it's not detected. In such a
1338 case, use force_ac97=1 option - but *NO* guarantee whether it
1339 works!
1341 Note: The NM256 chip can be linked internally with non-AC97
1342 codecs. This driver supports only the AC97 codec, and won't work
1343 with machines with other (most likely CS423x or OPL3SAx) chips,
1344 even though the device is detected in lspci. In such a case, try
1345 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1346 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1347 and proper hardware parameters in the case without ISA PnP.
1349 Note: some laptops need a workaround for AC97 RESET. For the
1350 known hardware like Dell Latitude LS and Sony PCG-F305, this
1351 workaround is enabled automatically. For other laptops with a
1352 hard freeze, you can try reset_workaround=1 option.
1354 Note: Dell Latitude CSx laptops have another problem regarding
1355 AC97 RESET. On these laptops, reset_workaround2 option is
1356 turned on as default. This option is worth to try if the
1357 previous reset_workaround option doesn't help.
1359 Note: This driver is really crappy. It's a porting from the
1360 OSS driver, which is a result of black-magic reverse engineering.
1361 The detection of codec will fail if the driver is loaded *after*
1362 X-server as described above. You might be able to force to load
1363 the module, but it may result in hang-up. Hence, make sure that
1364 you load this module *before* X if you encounter this kind of
1365 problem.
1367 Module snd-opl3sa2
1368 ------------------
1370 Module for Yamaha OPL3-SA2/SA3 sound cards.
1372 port - control port # for OPL3-SA chip (0x370)
1373 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1374 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1375 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1376 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1377 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1378 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1379 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1380 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1382 This module supports multiple cards and ISA PnP. It does not support
1383 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1385 The power-management is supported.
1387 Module snd-opti92x-ad1848
1388 -------------------------
1390 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1391 Module works with OAK Mozart cards as well.
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 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1408 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1409 fm_port - port # for OPL3 device (0x388)
1410 irq - IRQ # for WSS chip (5,7,9,10,11)
1411 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1412 dma1 - first DMA # for WSS chip (0,1,3)
1413 dma2 - second DMA # for WSS chip (0,1,3)
1415 This module supports only one card, autoprobe and PnP.
1417 Module snd-opti93x
1418 ------------------
1420 Module for sound cards based on OPTi 82c93x chips.
1422 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1423 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1424 fm_port - port # for OPL3 device (0x388)
1425 irq - IRQ # for WSS chip (5,7,9,10,11)
1426 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1427 dma1 - first DMA # for WSS chip (0,1,3)
1428 dma2 - second DMA # for WSS chip (0,1,3)
1430 This module supports only one card, autoprobe and PnP.
1432 Module snd-pcxhr
1433 ----------------
1435 Module for Digigram PCXHR boards
1437 This module supports multiple cards.
1439 Module snd-portman2x4
1440 ---------------------
1442 Module for Midiman Portman 2x4 parallel port MIDI interface
1444 This module supports multiple cards.
1446 Module snd-powermac (on ppc only)
1447 ---------------------------------
1449 Module for PowerMac, iMac and iBook on-board soundchips
1451 enable_beep - enable beep using PCM (enabled as default)
1453 Module supports autoprobe a chip.
1455 Note: the driver may have problems regarding endianess.
1457 The power-management is supported.
1459 Module snd-pxa2xx-ac97 (on arm only)
1460 ------------------------------------
1462 Module for AC97 driver for the Intel PXA2xx chip
1464 For ARM architecture only.
1466 The power-management is supported.
1468 Module snd-riptide
1469 ------------------
1471 Module for Conexant Riptide chip
1473 joystick_port - Joystick port # (default: 0x200)
1474 mpu_port - MPU401 port # (default: 0x330)
1475 opl3_port - OPL3 port # (default: 0x388)
1477 This module supports multiple cards.
1478 The driver requires the firmware loader support on kernel.
1479 You need to install the firmware file "riptide.hex" to the standard
1480 firmware path (e.g. /lib/firmware).
1482 Module snd-rme32
1483 ----------------
1485 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1486 Prodif96 and Prodif Gold) sound cards.
1488 This module supports multiple cards.
1490 Module snd-rme96
1491 ----------------
1493 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1495 This module supports multiple cards.
1497 Module snd-rme9652
1498 ------------------
1500 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1502 precise_ptr - Enable precise pointer (doesn't work reliably).
1503 (default = 0)
1505 This module supports multiple cards.
1507 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1508 module did formerly. It will allocate the buffers in advance
1509 when any RME9652 cards are found. To make the buffer
1510 allocation sure, load snd-page-alloc module in the early
1511 stage of boot sequence. See "Early Buffer Allocation"
1512 section.
1514 Module snd-sa11xx-uda1341 (on arm only)
1515 ---------------------------------------
1517 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1519 Module supports only one card.
1520 Module has no enable and index options.
1522 The power-management is supported.
1524 Module snd-sb8
1525 --------------
1527 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1528 SoundBlaster 2.0,
1529 SoundBlaster Pro
1531 port - port # for SB DSP chip (0x220,0x240,0x260)
1532 irq - IRQ # for SB DSP chip (5,7,9,10)
1533 dma8 - DMA # for SB DSP chip (1,3)
1535 This module supports multiple cards and autoprobe.
1537 The power-management is supported.
1539 Module snd-sb16 and snd-sbawe
1540 -----------------------------
1542 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1543 SoundBlaster AWE 32 (PnP),
1544 SoundBlaster AWE 64 PnP
1546 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1547 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1548 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1549 (snd-sbawe module only)
1550 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1551 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1552 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1553 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1554 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1555 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1557 This module supports multiple cards, autoprobe and ISA PnP.
1559 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1560 disable 16bit DMA with dma16 = -1 module parameter.
1561 Also, all Sound Blaster 16 type cards can operate in 16-bit
1562 half duplex mode through 8-bit DMA channel by disabling their
1563 16-bit DMA channel.
1565 The power-management is supported.
1567 Module snd-sgalaxy
1568 ------------------
1570 Module for Aztech Sound Galaxy sound card.
1572 sbport - Port # for SB16 interface (0x220,0x240)
1573 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1574 irq - IRQ # (7,9,10,11)
1575 dma1 - DMA #
1577 This module supports multiple cards.
1579 The power-management is supported.
1581 Module snd-sscape
1582 -----------------
1584 Module for ENSONIQ SoundScape PnP cards.
1586 port - Port # (PnP setup)
1587 irq - IRQ # (PnP setup)
1588 mpu_irq - MPU-401 IRQ # (PnP setup)
1589 dma - DMA # (PnP setup)
1591 This module supports multiple cards. ISA PnP must be enabled.
1592 You need sscape_ctl tool in alsa-tools package for loading
1593 the microcode.
1595 Module snd-sun-amd7930 (on sparc only)
1596 --------------------------------------
1598 Module for AMD7930 sound chips found on Sparcs.
1600 This module supports multiple cards.
1602 Module snd-sun-cs4231 (on sparc only)
1603 -------------------------------------
1605 Module for CS4231 sound chips found on Sparcs.
1607 This module supports multiple cards.
1609 Module snd-sun-dbri (on sparc only)
1610 -----------------------------------
1612 Module for DBRI sound chips found on Sparcs.
1614 This module supports multiple cards.
1616 Module snd-wavefront
1617 --------------------
1619 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1621 cs4232_pcm_port - Port # for CS4232 PCM interface.
1622 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1623 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1624 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1625 use_cs4232_midi - Use CS4232 MPU-401 interface
1626 (inaccessibly located inside your computer)
1627 ics2115_port - Port # for ICS2115
1628 ics2115_irq - IRQ # for ICS2115
1629 fm_port - FM OPL-3 Port #
1630 dma1 - DMA1 # for CS4232 PCM interface.
1631 dma2 - DMA2 # for CS4232 PCM interface.
1632 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1634 This module supports multiple cards and ISA PnP.
1636 Module snd-sonicvibes
1637 ---------------------
1639 Module for S3 SonicVibes PCI sound cards.
1640 * PINE Schubert 32 PCI
1642 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1643 - SoundCard must have onboard SRAM for this.
1644 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1646 This module supports multiple cards and autoprobe.
1648 Module snd-serial-u16550
1649 ------------------------
1651 Module for UART16550A serial MIDI ports.
1653 port - port # for UART16550A chip
1654 irq - IRQ # for UART16550A chip, -1 = poll mode
1655 speed - speed in bauds (9600,19200,38400,57600,115200)
1656 38400 = default
1657 base - base for divisor in bauds (57600,115200,230400,460800)
1658 115200 = default
1659 outs - number of MIDI ports in a serial port (1-4)
1660 1 = default
1661 adaptor - Type of adaptor.
1662 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1663 3 = MS-124W M/B, 4 = Generic
1665 This module supports multiple cards. This module does not support autoprobe
1666 thus the main port must be specified!!! Other options are optional.
1668 Module snd-trident
1669 ------------------
1671 Module for Trident 4DWave DX/NX sound cards.
1672 * Best Union Miss Melody 4DWave PCI
1673 * HIS 4DWave PCI
1674 * Warpspeed ONSpeed 4DWave PCI
1675 * AzTech PCI 64-Q3D
1676 * Addonics SV 750
1677 * CHIC True Sound 4Dwave
1678 * Shark Predator4D-PCI
1679 * Jaton SonicWave 4D
1681 pcm_channels - max channels (voices) reserved for PCM
1682 wavetable_size - max wavetable size in kB (4-?kb)
1684 This module supports multiple cards and autoprobe.
1686 The power-management is supported.
1688 Module snd-usb-audio
1689 --------------------
1691 Module for USB audio and USB MIDI devices.
1693 vid - Vendor ID for the device (optional)
1694 pid - Product ID for the device (optional)
1695 device_setup - Device specific magic number (optional)
1696 - Influence depends on the device
1697 - Default: 0x0000
1699 This module supports multiple devices, autoprobe and hotplugging.
1701 Module snd-usb-caiaq
1702 --------------------
1704 Module for caiaq UB audio interfaces,
1705 * Native Instruments RigKontrol2
1706 * Native Instruments Kore Controller
1707 * Native Instruments Audio Kontrol 1
1708 * Native Instruments Audio 8 DJ
1710 This module supports multiple devices, autoprobe and hotplugging.
1712 Module snd-usb-usx2y
1713 --------------------
1715 Module for Tascam USB US-122, US-224 and US-428 devices.
1717 This module supports multiple devices, autoprobe and hotplugging.
1719 Note: you need to load the firmware via usx2yloader utility included
1720 in alsa-tools and alsa-firmware packages.
1722 Module snd-via82xx
1723 ------------------
1725 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1726 8233A, 8233C, 8235, 8237 (south) bridge.
1728 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1729 [VIA686A/686B only]
1730 joystick - Enable joystick (default off) [VIA686A/686B only]
1731 ac97_clock - AC'97 codec clock base (default 48000Hz)
1732 dxs_support - support DXS channels,
1733 0 = auto (default), 1 = enable, 2 = disable,
1734 3 = 48k only, 4 = no VRA, 5 = enable any sample
1735 rate and different sample rates on different
1736 channels
1737 [VIA8233/C, 8235, 8237 only]
1738 ac97_quirk - AC'97 workaround for strange hardware
1739 See "AC97 Quirk Option" section below.
1741 This module supports one chip and autoprobe.
1743 Note: on some SMP motherboards like MSI 694D the interrupts might
1744 not be generated properly. In such a case, please try to
1745 set the SMP (or MPS) version on BIOS to 1.1 instead of
1746 default value 1.4. Then the interrupt number will be
1747 assigned under 15. You might also upgrade your BIOS.
1749 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1750 channels as the first PCM. On these channels, up to 4
1751 streams can be played at the same time, and the controller
1752 can perform sample rate conversion with separate rates for
1753 each channel.
1754 As default (dxs_support = 0), 48k fixed rate is chosen
1755 except for the known devices since the output is often
1756 noisy except for 48k on some mother boards due to the
1757 bug of BIOS.
1758 Please try once dxs_support=5 and if it works on other
1759 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1760 know the PCI subsystem vendor/device id's (output of
1761 "lspci -nv").
1762 If dxs_support=5 does not work, try dxs_support=4; if it
1763 doesn't work too, try dxs_support=1. (dxs_support=1 is
1764 usually for old motherboards. The correct implemented
1765 board should work with 4 or 5.) If it still doesn't
1766 work and the default setting is ok, dxs_support=3 is the
1767 right choice. If the default setting doesn't work at all,
1768 try dxs_support=2 to disable the DXS channels.
1769 In any cases, please let us know the result and the
1770 subsystem vendor/device ids. See "Links and Addresses"
1771 below.
1773 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1774 additionally. The mpu_port option is for VIA686 chips only.
1776 The power-management is supported.
1778 Module snd-via82xx-modem
1779 ------------------------
1781 Module for VIA82xx AC97 modem
1783 ac97_clock - AC'97 codec clock base (default 48000Hz)
1785 This module supports one card and autoprobe.
1787 Note: The default index value of this module is -2, i.e. the first
1788 slot is excluded.
1790 The power-management is supported.
1792 Module snd-virmidi
1793 ------------------
1795 Module for virtual rawmidi devices.
1796 This module creates virtual rawmidi devices which communicate
1797 to the corresponding ALSA sequencer ports.
1799 midi_devs - MIDI devices # (1-4, default=4)
1801 This module supports multiple cards.
1803 Module snd-vx222
1804 ----------------
1806 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1808 mic - Enable Microphone on V222 Mic (NYI)
1809 ibl - Capture IBL size. (default = 0, minimum size)
1811 This module supports multiple cards.
1813 When the driver is compiled as a module and the hotplug firmware
1814 is supported, the firmware data is loaded via hotplug automatically.
1815 Install the necessary firmware files in alsa-firmware package.
1816 When no hotplug fw loader is available, you need to load the
1817 firmware via vxloader utility in alsa-tools package. To invoke
1818 vxloader automatically, add the following to /etc/modprobe.conf
1820 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1822 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1823 /etc/modules.conf, instead.)
1824 IBL size defines the interrupts period for PCM. The smaller size
1825 gives smaller latency but leads to more CPU consumption, too.
1826 The size is usually aligned to 126. As default (=0), the smallest
1827 size is chosen. The possible IBL values can be found in
1828 /proc/asound/cardX/vx-status proc file.
1830 The power-management is supported.
1832 Module snd-vxpocket
1833 -------------------
1835 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1837 ibl - Capture IBL size. (default = 0, minimum size)
1839 This module supports multiple cards. The module is compiled only when
1840 PCMCIA is supported on kernel.
1842 With the older 2.6.x kernel, to activate the driver via the card
1843 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1844 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1845 longer require a config file.
1847 When the driver is compiled as a module and the hotplug firmware
1848 is supported, the firmware data is loaded via hotplug automatically.
1849 Install the necessary firmware files in alsa-firmware package.
1850 When no hotplug fw loader is available, you need to load the
1851 firmware via vxloader utility in alsa-tools package.
1853 About capture IBL, see the description of snd-vx222 module.
1855 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
1856 ALSA 1.0.10.
1858 The power-management is supported.
1860 Module snd-ymfpci
1861 -----------------
1863 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1865 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1866 1 (auto-detect for YMF744/754 only)
1867 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1868 1 (auto-detect for YMF744/754 only)
1869 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1870 1 (auto-detect)
1871 rear_switch - enable shared rear/line-in switch (bool)
1873 This module supports autoprobe and multiple chips.
1875 The power-management is supported.
1877 Module snd-pdaudiocf
1878 --------------------
1880 Module for Sound Core PDAudioCF sound card.
1882 The power-management is supported.
1885 AC97 Quirk Option
1886 =================
1888 The ac97_quirk option is used to enable/override the workaround for
1889 specific devices on drivers for on-board AC'97 controllers like
1890 snd-intel8x0. Some hardware have swapped output pins between Master
1891 and Headphone, or Surround (thanks to confusion of AC'97
1892 specifications from version to version :-)
1894 The driver provides the auto-detection of known problematic devices,
1895 but some might be unknown or wrongly detected. In such a case, pass
1896 the proper value with this option.
1898 The following strings are accepted:
1899 - default Don't override the default setting
1900 - none Disable the quirk
1901 - hp_only Bind Master and Headphone controls as a single control
1902 - swap_hp Swap headphone and master controls
1903 - swap_surround Swap master and surround controls
1904 - ad_sharing For AD1985, turn on OMS bit and use headphone
1905 - alc_jack For ALC65x, turn on the jack sense mode
1906 - inv_eapd Inverted EAPD implementation
1907 - mute_led Bind EAPD bit for turning on/off mute LED
1909 For backward compatibility, the corresponding integer value -1, 0,
1910 ... are accepted, too.
1912 For example, if "Master" volume control has no effect on your device
1913 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1916 Configuring Non-ISAPNP Cards
1917 ============================
1919 When the kernel is configured with ISA-PnP support, the modules
1920 supporting the isapnp cards will have module options "isapnp".
1921 If this option is set, *only* the ISA-PnP devices will be probed.
1922 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1923 together with the proper i/o and irq configuration.
1925 When the kernel is configured without ISA-PnP support, isapnp option
1926 will be not built in.
1929 Module Autoloading Support
1930 ==========================
1932 The ALSA drivers can be loaded automatically on demand by defining
1933 module aliases. The string 'snd-card-%1' is requested for ALSA native
1934 devices where %i is sound card number from zero to seven.
1936 To auto-load an ALSA driver for OSS services, define the string
1937 'sound-slot-%i' where %i means the slot number for OSS, which
1938 corresponds to the card index of ALSA. Usually, define this
1939 as the same card module.
1941 An example configuration for a single emu10k1 card is like below:
1942 ----- /etc/modprobe.conf
1943 alias snd-card-0 snd-emu10k1
1944 alias sound-slot-0 snd-emu10k1
1945 ----- /etc/modprobe.conf
1947 The available number of auto-loaded sound cards depends on the module
1948 option "cards_limit" of snd module. As default it's set to 1.
1949 To enable the auto-loading of multiple cards, specify the number of
1950 sound cards in that option.
1952 When multiple cards are available, it'd better to specify the index
1953 number for each card via module option, too, so that the order of
1954 cards is kept consistent.
1956 An example configuration for two sound cards is like below:
1958 ----- /etc/modprobe.conf
1959 # ALSA portion
1960 options snd cards_limit=2
1961 alias snd-card-0 snd-interwave
1962 alias snd-card-1 snd-ens1371
1963 options snd-interwave index=0
1964 options snd-ens1371 index=1
1965 # OSS/Free portion
1966 alias sound-slot-0 snd-interwave
1967 alias sound-slot-1 snd-ens1371
1968 ----- /etc/modprobe.conf
1970 In this example, the interwave card is always loaded as the first card
1971 (index 0) and ens1371 as the second (index 1).
1974 ALSA PCM devices to OSS devices mapping
1975 =======================================
1977 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1978 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1979 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1980 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1981 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1982 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1983 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1984 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1985 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1987 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1988 sound card number and second means device number. The ALSA devices
1989 have either 'c' or 'p' suffix indicating the direction, capture and
1990 playback, respectively.
1992 Please note that the device mapping above may be varied via the module
1993 options of snd-pcm-oss module.
1996 Proc interfaces (/proc/asound)
1997 ==============================
1999 /proc/asound/card#/pcm#[cp]/oss
2000 -------------------------------
2001 String "erase" - erase all additional informations about OSS applications
2002 String "<app_name> <fragments> <fragment_size> [<options>]"
2004 <app_name> - name of application with (higher priority) or without path
2005 <fragments> - number of fragments or zero if auto
2006 <fragment_size> - size of fragment in bytes or zero if auto
2007 <options> - optional parameters
2008 - disable the application tries to open a pcm device for
2009 this channel but does not want to use it.
2010 (Cause a bug or mmap needs)
2011 It's good for Quake etc...
2012 - direct don't use plugins
2013 - block force block mode (rvplayer)
2014 - non-block force non-block mode
2015 - whole-frag write only whole fragments (optimization affecting
2016 playback only)
2017 - no-silence do not fill silence ahead to avoid clicks
2018 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2019 instead of filled blocks
2021 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2022 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2023 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2026 Early Buffer Allocation
2027 =======================
2029 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2030 sometimes it's too late to find such spaces when the driver module is
2031 actually loaded due to memory fragmentation. You can pre-allocate the
2032 PCM buffers by loading snd-page-alloc module and write commands to its
2033 proc file in prior, for example, in the early boot stage like
2034 /etc/init.d/*.local scripts.
2036 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2037 usage of page allocation. In writing, you can send the following
2038 commands to the snd-page-alloc driver:
2040 - add VENDOR DEVICE MASK SIZE BUFFERS
2042 VENDOR and DEVICE are PCI vendor and device IDs. They take
2043 integer numbers (0x prefix is needed for the hex).
2044 MASK is the PCI DMA mask. Pass 0 if not restricted.
2045 SIZE is the size of each buffer to allocate. You can pass
2046 k and m suffix for KB and MB. The max number is 16MB.
2047 BUFFERS is the number of buffers to allocate. It must be greater
2048 than 0. The max number is 4.
2050 - erase
2052 This will erase the all pre-allocated buffers which are not in
2053 use.
2056 Links and Addresses
2057 ===================
2059 ALSA project homepage
2060 http://www.alsa-project.org
2062 ALSA Bug Tracking System
2063 https://bugtrack.alsa-project.org/bugs/
2065 ALSA Developers ML
2066 mailto:alsa-devel@alsa-project.org