26 menuconfig SND_DRIVERS
27 bool "Generic sound devices"
30 Support for generic sound devices.
35 tristate "PC-Speaker support (READ HELP!)"
36 depends on PCSPKR_PLATFORM && X86 && HIGH_RES_TIMERS
38 depends on EXPERIMENTAL
41 If you don't have a sound card in your computer, you can include a
42 driver for the PC speaker which allows it to act like a primitive
44 This driver also replaces the pcspkr driver for beeps.
46 You can compile this as a module which will be called snd-pcsp.
48 WARNING: if you already have a soundcard, enabling this
49 driver may lead to a problem. Namely, it may get loaded
50 before the other sound driver of yours, making the
51 pc-speaker a default sound device. Which is likely not
52 what you want. To make this driver play nicely with other
53 sound driver, you can add this into your /etc/modprobe.conf:
54 options snd-pcsp index=2
56 You don't need this driver if you only want your pc-speaker to beep.
57 You don't need this driver if you have a tablet piezo beeper
58 in your PC instead of the real speaker.
60 Say N if you have a sound card.
62 Say Y only if you really know what you do.
65 tristate "Dummy (/dev/null) soundcard"
68 Say Y here to include the dummy driver. This driver does
69 nothing, but emulates various mixer controls and PCM devices.
71 You don't need this unless you're testing the hardware support
72 of programs using the ALSA API.
74 To compile this driver as a module, choose M here: the module
75 will be called snd-dummy.
78 tristate "Generic loopback driver (PCM)"
81 Say 'Y' or 'M' to include support for the PCM loopback device.
82 This module returns played samples back to the user space using
83 the standard ALSA PCM device. The devices are routed 0->1 and
84 1->0, where first number is the playback PCM device and second
85 number is the capture device. Module creates two PCM devices and
86 configured number of substreams (see the pcm_substreams module
89 The looback device allow time sychronization with an external
90 timing source using the time shift universal control (+-20%
93 To compile this driver as a module, choose M here: the module
94 will be called snd-aloop.
97 tristate "Virtual MIDI soundcard"
98 depends on SND_SEQUENCER
102 Say Y here to include the virtual MIDI driver. This driver
103 allows to connect applications using raw MIDI devices to
106 If you don't know what MIDI is, say N here.
108 To compile this driver as a module, choose M here: the module
109 will be called snd-virmidi.
112 tristate "MOTU MidiTimePiece AV multiport MIDI"
115 To use a MOTU MidiTimePiece AV multiport MIDI adapter
116 connected to the parallel port, say Y here and make sure that
117 the standard parallel port driver isn't used for the port.
119 To compile this driver as a module, choose M here: the module
120 will be called snd-mtpav.
123 tristate "ESI Miditerminal 4140 driver"
127 The ESI Miditerminal 4140 is a 4 In 4 Out MIDI Interface with
128 additional SMPTE Timecode capabilities for the parallel port.
130 Say 'Y' to include support for this device.
132 To compile this driver as a module, chose 'M' here: the module
133 will be called snd-mts64.
135 config SND_SERIAL_U16550
136 tristate "UART16550 serial MIDI driver"
139 To include support for MIDI serial port interfaces, say Y here
140 and read <file:Documentation/sound/alsa/serial-u16550.txt>.
141 This driver works with serial UARTs 16550 and better.
143 This driver accesses the serial port hardware directly, so
144 make sure that the standard serial driver isn't used or
145 deactivated with setserial before loading this driver.
147 To compile this driver as a module, choose M here: the module
148 will be called snd-serial-u16550.
151 tristate "Generic MPU-401 UART driver"
152 select SND_MPU401_UART
154 Say Y here to include support for MIDI ports compatible with
155 the Roland MPU-401 interface in UART mode.
157 To compile this driver as a module, choose M here: the module
158 will be called snd-mpu401.
160 config SND_PORTMAN2X4
161 tristate "Portman 2x4 driver"
165 Say Y here to include support for Midiman Portman 2x4 parallel
168 To compile this driver as a module, choose M here: the module
169 will be called snd-portman2x4.
171 config SND_ML403_AC97CR
172 tristate "Xilinx ML403 AC97 Controller Reference"
173 depends on XILINX_VIRTEX
174 select SND_AC97_CODEC
176 Say Y here to include support for the
177 opb_ac97_controller_ref_v1_00_a ip core found in Xilinx's ML403
180 To compile this driver as a module, choose M here: the module
181 will be called snd-ml403_ac97cr.
183 config SND_AC97_POWER_SAVE
184 bool "AC97 Power-Saving Mode"
185 depends on SND_AC97_CODEC
188 Say Y here to enable the aggressive power-saving support of
189 AC97 codecs. In this mode, the power-mode is dynamically
190 controlled at each open/close.
192 The mode is activated by passing 'power_save=X' to the
193 snd-ac97-codec driver module, where 'X' is the time-out
194 value, a nonnegative integer that specifies how many
195 seconds of idle time the driver must count before it may
196 put the AC97 into power-save mode; a value of 0 (zero)
197 disables the use of this power-save mode.
199 After the snd-ac97-codec driver module has been loaded,
200 the 'power_save' parameter can be set via sysfs as follows:
202 echo 10 > /sys/module/snd_ac97_codec/parameters/power_save
204 In this case, the time-out is set to 10 seconds; setting
205 the time-out to 1 second (the minimum activation value)
206 isn't recommended because many applications try to reopen
207 the device frequently. A value of 10 seconds would be a
208 good choice for normal operations.
210 See Documentation/sound/alsa/powersave.txt for more details.
212 config SND_AC97_POWER_SAVE_DEFAULT
213 int "Default time-out for AC97 power-save mode"
214 depends on SND_AC97_POWER_SAVE
217 The default time-out value in seconds for AC97 automatic
218 power-save mode. 0 means to disable the power-save mode.
220 See SND_AC97_POWER_SAVE for more details.