2 Advanced Linux Sound Architecture - Driver
3 ==========================================
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
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'.
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.
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
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
64 - E.g.: device_mode=0660
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
78 - Don't block opening busy PCM devices.
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
102 Common parameters for top sound card modules
103 --------------------------------------------
105 Each of top level sound card module takes the following options.
107 index - index (slot #) of sound card
108 - Values: 0 through 7 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
121 - Default: enabled, for PCI and ISA PnP cards
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
136 Module supports up to 8 cards, autoprobe and PnP.
141 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
143 port - port # for AD1848 chip
144 irq - IRQ # for AD1848 chip
145 dma1 - DMA # for AD1848 chip (0,1,3)
147 Module supports up to 8 cards. This module does not support autoprobe
148 thus main port must be specified!!! Other ports are optional.
153 Module for ALi M5451 PCI chip.
155 pcm_channels - Number of hardware channels assigned for PCM
156 spdif - Support SPDIF I/O
159 Module supports autoprobe and multiple chips (max 8).
161 The power-management is supported.
166 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
168 port - port # for ALS100 (SB16) chip (PnP setup)
169 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
170 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
171 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
172 mpu_port - port # for MPU-401 UART (PnP setup)
173 mpu_irq - IRQ # for MPU-401 (PnP setup)
174 fm_port - port # for OPL3 FM (PnP setup)
176 Module supports up to 8 cards, autoprobe and PnP.
181 Module for sound cards based on Avance Logic ALS4000 PCI chip.
183 joystick_port - port # for legacy joystick support.
184 0 = disabled (default), 1 = auto-detect
186 Module supports up to 8 cards, autoprobe and PnP.
191 Module for ATI IXP 150/200/250 AC97 controllers.
193 ac97_clock - AC'97 clock (defalut = 48000)
194 ac97_quirk - AC'97 workaround for strange hardware
195 See the description of intel8x0 module for details.
196 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
198 This module supports up to 8 cards and autoprobe.
200 Module snd-atiixp-modem
201 -----------------------
203 Module for ATI IXP 150/200/250 AC97 modem controllers.
205 Module supports up to 8 cards.
207 Note: The default index value of this module is -2, i.e. the first
210 Module snd-au8810, snd-au8820, snd-au8830
211 -----------------------------------------
213 Module for Aureal Vortex, Vortex2 and Advantage device.
215 pcifix - Control PCI workarounds
216 0 = Disable all workarounds
217 1 = Force the PCI latency of the Aureal card to 0xff
218 2 = Force the Extend PCI#2 Internal Master for Efficient
219 Handling of Dummy Requests on the VIA KT133 AGP Bridge
220 3 = Force both settings
221 255 = Autodetect what is required (default)
223 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
224 EQ, mpu401, gameport. A3D and wavetable support are still in development.
225 Development and reverse engineering work is being coordinated at
226 http://savannah.nongnu.org/projects/openvortex/
227 SPDIF output has a copy of the AC97 codec output, unless you use the
228 "spdif" pcm device, which allows raw data passthru.
229 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
232 Note: Some ALSA mixer applicactions don't handle the SPDIF samplerate
233 control correctly. If you have problems regarding this, try
234 another ALSA compliant mixer (alsamixer works).
239 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
241 port - port # for AZT2320 chip (PnP setup)
242 wss_port - port # for WSS (PnP setup)
243 mpu_port - port # for MPU-401 UART (PnP setup)
244 fm_port - FM port # for AZT2320 chip (PnP setup)
245 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
246 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
247 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
248 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
250 Module supports up to 8 cards, PnP and autoprobe.
255 Module for sound cards based on Aztech AZF3328 PCI chip.
257 joystick - Enable joystick (default off)
259 Module supports up to 8 cards.
264 Module for video cards based on Bt87x chips.
266 digital_rate - Override the default digital rate (Hz)
267 load_all - Load the driver even if the card model isn't known
269 Module supports up to 8 cards.
271 Note: The default index value of this module is -2, i.e. the first
277 Module for Creative Audigy LS and SB Live 24bit
279 Module supports up to 8 cards.
285 Module for sound cards based on C-Media CMI8330 ISA chips.
287 wssport - port # for CMI8330 chip (WSS)
288 wssirq - IRQ # for CMI8330 chip (WSS)
289 wssdma - first DMA # for CMI8330 chip (WSS)
290 sbport - port # for CMI8330 chip (SB16)
291 sbirq - IRQ # for CMI8330 chip (SB16)
292 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
293 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
295 Module supports up to 8 cards and autoprobe.
300 Module for C-Media CMI8338 and 8738 PCI sound cards.
302 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
303 fm_port - 0x388 (default), 0 = disable (default)
304 soft_ac3 - Sofware-conversion of raw SPDIF packets (model 033 only)
306 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
308 Module supports autoprobe and multiple chips (max 8).
313 Module for sound cards based on CS4231 ISA chips.
315 port - port # for CS4231 chip
316 mpu_port - port # for MPU-401 UART (optional), -1 = disable
317 irq - IRQ # for CS4231 chip
318 mpu_irq - IRQ # for MPU-401 UART
319 dma1 - first DMA # for CS4231 chip
320 dma2 - second DMA # for CS4231 chip
322 Module supports up to 8 cards. This module does not support autoprobe
323 thus main port must be specified!!! Other ports are optional.
325 The power-management is supported.
330 Module for sound cards based on CS4232/CS4232A ISA chips.
332 port - port # for CS4232 chip (PnP setup - 0x534)
333 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
334 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
335 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
336 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
337 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
338 dma1 - first DMA # for CS4232 chip (0,1,3)
339 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
340 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
342 Module supports up to 8 cards. This module does not support autoprobe
343 thus main port must be specified!!! Other ports are optional.
345 The power-management is supported.
350 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
351 CS4238B/CS4239 ISA chips.
353 port - port # for CS4236 chip (PnP setup - 0x534)
354 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
355 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
356 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
357 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
358 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
359 dma1 - first DMA # for CS4236 chip (0,1,3)
360 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
361 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
363 Module supports up to 8 cards. This module does not support autoprobe
364 (if ISA PnP is not used) thus main port and control port must be
365 specified!!! Other ports are optional.
367 The power-management is supported.
372 Module for Cirrus Logic CS4281 soundchip.
374 dual_codec - Secondary codec ID (0 = disable, default)
376 Module supports up to 8 cards.
378 The power-management is supported.
383 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
384 CS4624/CS4630/CS4280 PCI chips.
386 external_amp - Force to enable external amplifer.
387 thinkpad - Force to enable Thinkpad's CLKRUN control.
388 mmap_valid - Support OSS mmap mode (default = 0).
390 Module supports up to 8 cards and autoprobe.
391 Usually external amp and CLKRUN controls are detected automatically
392 from PCI sub vendor/device ids. If they don't work, give the options
395 The power-management is supported.
400 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
403 port - Port # (PnP setup)
404 mpu_port - Port # for MPU-401 (PnP setup)
405 fm_port - Port # for FM OPL-3 (PnP setup)
406 irq - IRQ # (PnP setup)
407 mpu_irq - IRQ # for MPU-401 (PnP setup)
408 dma8 - DMA # (PnP setup)
410 Module supports up to 8 cards. This module is enabled only with
416 Module for the dummy sound card. This "card" doesn't do any output
417 or input, but you may use this module for any application which
418 requires a sound card (like RealPlayer).
423 Module for EMU10K1/EMU10k2 based PCI sound cards.
424 * Sound Blaster Live!
425 * Sound Blaster PCI 512
426 * Emu APS (partially supported)
427 * Sound Blaster Audigy
429 extin - bitmap of available external inputs for FX8010 (see bellow)
430 extout - bitmap of available external outputs for FX8010 (see bellow)
431 seq_ports - allocated sequencer ports (4 by default)
432 max_synth_voices - limit of voices used for wavetable (64 by default)
433 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
434 given in MB unit. Default value is 128.
435 enable_ir - enable IR
437 Module supports up to 8 cards and autoprobe.
439 Input & Output configurations [extin/extout]
440 * Creative Card wo/Digital out [0x0003/0x1f03]
441 * Creative Card w/Digital out [0x0003/0x1f0f]
442 * Creative Card w/Digital CD in [0x000f/0x1f0f]
443 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
444 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
445 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
446 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
447 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
448 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
449 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
450 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
451 * Creative Card all ins and outs [0x3fff/0x7fff]
456 Module for Creative Emu10k1X (SB Live Dell OEM version)
458 Module supports up to 8 cards.
463 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
464 * SoundBlaster PCI 64
465 * SoundBlaster PCI 128
467 joystick - Enable joystick (default off)
469 Module supports up to 8 cards and autoprobe.
474 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
475 * SoundBlaster PCI 64
476 * SoundBlaster PCI 128
477 * SoundBlaster Vibra PCI
479 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
480 0 = disable (default), 1 = auto-detect
482 Module supports up to 8 cards and autoprobe.
487 Module for sound cards based on ESS ES968 chip (PnP only).
489 port - port # for ES968 (SB8) chip (PnP setup)
490 irq - IRQ # for ES968 (SB8) chip (PnP setup)
491 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
493 Module supports up to 8 cards, PnP and autoprobe.
498 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
500 port - port # for ES-1688 chip (0x220,0x240,0x260)
501 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
502 irq - IRQ # for ES-1688 chip (5,7,9,10)
503 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
504 dma8 - DMA # for ES-1688 chip (0,1,3)
506 Module supports up to 8 cards and autoprobe (without MPU-401 port).
511 Module for ESS AudioDrive ES-18xx sound cards.
513 port - port # for ES-18xx chip (0x220,0x240,0x260)
514 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
515 fm_port - port # for FM (optional, not used)
516 irq - IRQ # for ES-18xx chip (5,7,9,10)
517 dma1 - first DMA # for ES-18xx chip (0,1,3)
518 dma2 - first DMA # for ES-18xx chip (0,1,3)
519 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
521 Module supports up to 8 cards ISA PnP and autoprobe (without MPU-401 port
522 if native ISA PnP routines are not used).
523 When dma2 is equal with dma1, the driver works as half-duplex.
525 The power-management is supported.
530 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
532 Module supports up to 8 cards and autoprobe.
537 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
539 total_bufsize - total buffer size in kB (1-4096kB)
540 pcm_substreams_p - playback channels (1-8, default=2)
541 pcm_substreams_c - capture channels (1-8, default=0)
542 clock - clock (0 = auto-detection)
543 use_pm - support the power-management (0 = off, 1 = on,
545 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
546 joystick - enable joystick (default off)
548 Module supports up to 8 cards and autoprobe.
550 The power-management is supported.
555 Module for ForteMedia FM801 based PCI sound cards.
557 tea575x_tuner - Enable TEA575x tuner
558 - 1 = MediaForte 256-PCS
559 - 2 = MediaForte 256-PCPR
560 - 3 = MediaForte 64-PCR
561 - High 16-bits are video (radio) device number + 1
562 - example: 0x10002 (MediaForte 256-PCPR, device 1)
564 Module supports up to 8 cards and autoprobe.
566 Module snd-gusclassic
567 ---------------------
569 Module for Gravis UltraSound Classic sound card.
571 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
572 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
573 dma1 - DMA # for GF1 chip (1,3,5,6,7)
574 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
575 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
576 voices - GF1 voices limit (14-32)
577 pcm_voices - reserved PCM voices
579 Module supports up to 8 cards and autoprobe.
581 Module snd-gusextreme
582 ---------------------
584 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
586 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
587 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
588 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
589 irq - IRQ # for ES-1688 chip (5,7,9,10)
590 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
591 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
592 dma8 - DMA # for ES-1688 chip (0,1,3)
593 dma1 - DMA # for GF1 chip (1,3,5,6,7)
594 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
595 voices - GF1 voices limit (14-32)
596 pcm_voices - reserved PCM voices
598 Module supports up to 8 cards and autoprobe (without MPU-401 port).
603 Module for Gravis UltraSound MAX sound card.
605 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
606 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
607 dma1 - DMA # for GF1 chip (1,3,5,6,7)
608 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
609 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
610 voices - GF1 voices limit (14-32)
611 pcm_voices - reserved PCM voices
613 Module supports up to 8 cards and autoprobe.
618 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
621 model - force the model name
622 position_fix - Fix DMA pointer (0 = FIFO size, 1 = none, 2 = POSBUF)
624 Module supports up to 8 cards.
626 Each codec may have a model table for different configurations.
627 If your machine isn't listed there, the default (usually minimal)
628 configuration is set up. You can pass "model=<name>" option to
629 specify a certain model in such a case. There are different
630 models depending on the codec chip.
632 Model name Description
633 ---------- -----------
635 3stack 3-jack in back and a headphone out
636 3stack-digout 3-jack in back, a HP out and a SPDIF out
637 5stack 5-jack in back, 2-jack in front
638 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
640 z71v 3-jack (HP shared SPDIF)
643 minimal 3-jack in back
644 min_fp 3-jack in back, 2-jack in front
645 full 6-jack in back, 2-jack in front
646 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
647 allout 5-jack in back, 2-jack in front, SPDIF out
649 Note 2: If you get click noises on output, try the module option
650 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
651 register value without FIFO size correction as the current
652 DMA pointer. position_fix=2 will make the driver to use
653 the position buffer instead of reading SD_LPIB register.
654 (Usually SD_LPLIB register is more accurate than the
660 Module for RME Hammerfall DSP audio interface(s)
662 Module supports up to 8 cards.
664 Note: The firmware data can be automatically loaded via hotplug
665 when CONFIG_FW_LOADER is set. Otherwise, you need to load
666 the firmware via hdsploader utility included in alsa-tools
668 The firmware data is found in alsa-firmware package.
670 Note: snd-page-alloc module does the job which snd-hammerfall-mem
671 module did formerly. It will allocate the buffers in advance
672 when any HDSP cards are found. To make the buffer
673 allocation sure, load snd-page-alloc module in the early
674 stage of boot sequence. See "Early Buffer Allocation"
680 Module for Envy24 (ICE1712) based PCI sound cards.
681 * MidiMan M Audio Delta 1010
682 * MidiMan M Audio Delta 1010LT
683 * MidiMan M Audio Delta DiO 2496
684 * MidiMan M Audio Delta 66
685 * MidiMan M Audio Delta 44
686 * MidiMan M Audio Delta 410
687 * MidiMan M Audio Audiophile 2496
693 * Hoontech SoundTrack DSP 24
694 * Hoontech SoundTrack DSP 24 Value
695 * Hoontech SoundTrack DSP 24 Media 7.1
696 * Event Electronics, EZ8
698 * Lionstracs, Mediastaton
700 model - Use the given board model, one of the following:
701 delta1010, dio2496, delta66, delta44, audiophile, delta410,
702 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
703 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
704 phase88, mediastation
705 omni - Omni I/O support for MidiMan M-Audio Delta44/66
706 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
707 in msec resolution, default value is 500 (0.5 sec)
709 Module supports up to 8 cards and autoprobe. Note: The consumer part
710 is not used with all Envy24 based cards (for example in the MidiMan Delta
713 Note: The supported board is detected by reading EEPROM or PCI
714 SSID (if EEPROM isn't available). You can override the
715 model by passing "model" module option in case that the
716 driver isn't configured properly or you want to try another
722 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
723 * MidiMan M Audio Revolution 7.1
725 * TerraTec Aureon 5.1 Sky
726 * TerraTec Aureon 7.1 Space
727 * TerraTec Aureon 7.1 Universe
730 * AudioTrak Prodigy 7.1
731 * AudioTrak Prodigy 192
733 * Albatron K8X800 Pro II
740 model - Use the given board model, one of the following:
741 revo71, amp2000, prodigy71, prodigy192, aureon51,
742 aureon71, universe, k8x800, phase22, phase28, ms300,
745 Module supports up to 8 cards and autoprobe.
747 Note: The supported board is detected by reading EEPROM or PCI
748 SSID (if EEPROM isn't available). You can override the
749 model by passing "model" module option in case that the
750 driver isn't configured properly or you want to try another
756 Module for AC'97 motherboards from Intel and compatibles.
757 * Intel i810/810E, i815, i820, i830, i84x, MX440
759 * NVidia NForce, NForce2
760 * AMD AMD768, AMD8111
763 ac97_clock - AC'97 codec clock base (0 = auto-detect)
764 ac97_quirk - AC'97 workaround for strange hardware
765 The following strings are accepted:
766 default = don't override the default setting
767 disable = disable the quirk
768 hp_only = use headphone control as master
769 swap_hp = swap headphone and master controls
770 swap_surround = swap master and surround controls
771 ad_sharing = for AD1985, turn on OMS bit and use headphone
772 alc_jack = for ALC65x, turn on the jack sense mode
773 inv_eapd = inverted EAPD implementation
774 mute_led = bind EAPD bit for turning on/off mute LED
775 For backward compatibility, the corresponding integer
776 value -1, 0, ... are accepted, too.
777 buggy_irq - Enable workaround for buggy interrupts on some
778 motherboards (default off)
780 Module supports autoprobe and multiple bus-master chips (max 8).
782 Note: the latest driver supports auto-detection of chip clock.
783 if you still encounter too fast playback, specify the clock
784 explicitly via the module option "ac97_clock=41194".
786 Joystick/MIDI ports are not supported by this driver. If your
787 motherboard has these devices, use the ns558 or snd-mpu401
788 modules, respectively.
790 The ac97_quirk option is used to enable/override the workaround
791 for specific devices. Some hardware have swapped output pins
792 between Master and Headphone, or Surround. The driver provides
793 the auto-detection of known problematic devices, but some might
794 be unknown or wrongly detected. In such a case, pass the proper
795 value with this option.
797 The power-management is supported.
802 Module for Intel ICH (i8x0) chipset MC97 modems.
804 ac97_clock - AC'97 codec clock base (0 = auto-detect)
806 This module supports up to 8 cards and autoprobe.
808 Note: The default index value of this module is -2, i.e. the first
814 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
815 and other sound cards based on AMD InterWave (tm) chip.
817 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
818 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
819 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
820 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
821 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
822 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
823 pcm_voices - reserved PCM voices for the synthesizer (default 2)
824 effect - 1 = InterWave effects enable (default 0);
827 Module supports up to 8 cards, autoprobe and ISA PnP.
829 Module snd-interwave-stb
830 ------------------------
832 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
833 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
834 circuit for extended control of bass, treble and master volume.
836 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
837 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
838 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
839 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
840 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
841 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
842 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
843 pcm_voices - reserved PCM voices for the synthesizer (default 2)
844 effect - 1 = InterWave effects enable (default 0);
847 Module supports up to 8 cards, autoprobe and ISA PnP.
852 Module for Korg 1212 IO PCI card
854 Module supports up to 8 cards.
859 Module for Allegro/Maestro3 chips
861 external_amp - enable external amp (enabled by default)
862 amp_gpio - GPIO pin number for external amp (0-15) or
863 -1 for default pin (8 for allegro, 1 for
866 Module supports autoprobe and multiple chips (max 8).
868 Note: the binding of amplifier is dependent on hardware.
869 If there is no sound even though all channels are unmuted, try to
870 specify other gpio connection via amp_gpio option.
871 For example, a Panasonic notebook might need "amp_gpio=0x0d"
874 The power-management is supported.
879 Module for Digigram miXart8 sound cards.
881 Module supports multiple cards.
882 Note: One miXart8 board will be represented as 4 alsa cards.
883 See MIXART.txt for details.
885 When the driver is compiled as a module and the hotplug firmware
886 is supported, the firmware data is loaded via hotplug automatically.
887 Install the necessary firmware files in alsa-firmware package.
888 When no hotplug fw loader is available, you need to load the
889 firmware via mixartloader utility in alsa-tools package.
894 Module for MPU-401 UART devices.
896 port - port number or -1 (disable)
897 irq - IRQ number or -1 (disable)
898 pnp - PnP detection - 0 = disable, 1 = enable (default)
900 Module supports multiple devices (max 8) and PnP.
905 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
908 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
909 irq - IRQ # for MTPAV (7,5, default=7)
910 hwports - number of supported hardware ports, default=8.
912 Module supports only 1 card. This module has no enable option.
917 Module for NeoMagic NM256AV/ZX chips
919 playback_bufsize - max playback frame size in kB (4-128kB)
920 capture_bufsize - max capture frame size in kB (4-128kB)
921 force_ac97 - 0 or 1 (disabled by default)
922 buffer_top - specify buffer top address
923 use_cache - 0 or 1 (disabled by default)
924 vaio_hack - alias buffer_top=0x25a800
925 reset_workaround - enable AC97 RESET workaround for some laptops
927 Module supports autoprobe and multiple chips (max 8).
929 The power-management is supported.
931 Note: on some notebooks the buffer address cannot be detected
932 automatically, or causes hang-up during initialization.
933 In such a case, specify the buffer top address explicity via
936 Sony F250: buffer_top=0x25a800
937 Sony F270: buffer_top=0x272800
938 The driver supports only ac97 codec. It's possible to force
939 to initialize/use ac97 although it's not detected. In such a
940 case, use force_ac97=1 option - but *NO* guarantee whether it
943 Note: The NM256 chip can be linked internally with non-AC97
944 codecs. This driver supports only the AC97 codec, and won't work
945 with machines with other (most likely CS423x or OPL3SAx) chips,
946 even though the device is detected in lspci. In such a case, try
947 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
948 but some doesn't have ISA PnP. You'll need to speicfy isapnp=0
949 and proper hardware parameters in the case without ISA PnP.
951 Note: some laptops need a workaround for AC97 RESET. For the
952 known hardware like Dell Latitude LS and Sony PCG-F305, this
953 workaround is enabled automatically. For other laptops with a
954 hard freeze, you can try reset_workaround=1 option.
956 Note: This driver is really crappy. It's a porting from the
957 OSS driver, which is a result of black-magic reverse engineering.
958 The detection of codec will fail if the driver is loaded *after*
959 X-server as described above. You might be able to force to load
960 the module, but it may result in hang-up. Hence, make sure that
961 you load this module *before* X if you encounter this kind of
967 Module for Yamaha OPL3-SA2/SA3 sound cards.
969 port - control port # for OPL3-SA chip (0x370)
970 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
971 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
972 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
973 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
974 irq - IRQ # for OPL3-SA chip (5,7,9,10)
975 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
976 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
977 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
979 Module supports up to 8 cards and ISA PnP. This module does not support
980 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
982 The power-management is supported.
984 Module snd-opti92x-ad1848
985 -------------------------
987 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
988 Module works with OAK Mozart cards as well.
990 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
991 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
992 fm_port - port # for OPL3 device (0x388)
993 irq - IRQ # for WSS chip (5,7,9,10,11)
994 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
995 dma1 - first DMA # for WSS chip (0,1,3)
997 This module supports only one card, autoprobe and PnP.
999 Module snd-opti92x-cs4231
1000 -------------------------
1002 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1004 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1005 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1006 fm_port - port # for OPL3 device (0x388)
1007 irq - IRQ # for WSS chip (5,7,9,10,11)
1008 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1009 dma1 - first DMA # for WSS chip (0,1,3)
1010 dma2 - second DMA # for WSS chip (0,1,3)
1012 This module supports only one card, autoprobe and PnP.
1017 Module for sound cards based on OPTi 82c93x chips.
1019 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1020 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1021 fm_port - port # for OPL3 device (0x388)
1022 irq - IRQ # for WSS chip (5,7,9,10,11)
1023 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1024 dma1 - first DMA # for WSS chip (0,1,3)
1025 dma2 - second DMA # for WSS chip (0,1,3)
1027 This module supports only one card, autoprobe and PnP.
1029 Module snd-powermac (on ppc only)
1030 ---------------------------------
1032 Module for PowerMac, iMac and iBook on-board soundchips
1034 enable_beep - enable beep using PCM (enabled as default)
1036 Module supports autoprobe a chip.
1038 Note: the driver may have problems regarding endianess.
1040 The power-management is supported.
1045 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1046 Prodif96 and Prodif Gold) sound cards.
1048 Module supports up to 8 cards.
1053 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1055 Module supports up to 8 cards.
1060 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1062 precise_ptr - Enable precise pointer (doesn't work reliably).
1065 Module supports up to 8 cards.
1067 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1068 module did formerly. It will allocate the buffers in advance
1069 when any RME9652 cards are found. To make the buffer
1070 allocation sure, load snd-page-alloc module in the early
1071 stage of boot sequence. See "Early Buffer Allocation"
1074 Module snd-sa11xx-uda1341 (on arm only)
1075 ---------------------------------------
1077 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1079 Module supports only one card.
1080 Module has no enable and index options.
1085 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1089 port - port # for SB DSP chip (0x220,0x240,0x260)
1090 irq - IRQ # for SB DSP chip (5,7,9,10)
1091 dma8 - DMA # for SB DSP chip (1,3)
1093 Module supports up to 8 cards and autoprobe.
1095 Module snd-sb16 and snd-sbawe
1096 -----------------------------
1098 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1099 SoundBlaster AWE 32 (PnP),
1100 SoundBlaster AWE 64 PnP
1102 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1103 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1104 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1105 (snd-sbawe module only)
1106 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1107 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1108 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1109 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1110 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1111 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1113 Module supports up to 8 cards, autoprobe and ISA PnP.
1115 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1116 disable 16bit DMA with dma16 = -1 module parameter.
1117 Also, all Sound Blaster 16 type cards can operate in 16-bit
1118 half duplex mode through 8-bit DMA channel by disabling their
1124 Module for Aztech Sound Galaxy sound card.
1126 sbport - Port # for SB16 interface (0x220,0x240)
1127 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1128 irq - IRQ # (7,9,10,11)
1131 Module supports up to 8 cards.
1136 Module for ENSONIQ SoundScape PnP cards.
1138 port - Port # (PnP setup)
1139 irq - IRQ # (PnP setup)
1140 mpu_irq - MPU-401 IRQ # (PnP setup)
1141 dma - DMA # (PnP setup)
1143 Module supports up to 8 cards. ISA PnP must be enabled.
1144 You need sscape_ctl tool in alsa-tools package for loading
1147 Module snd-sun-amd7930 (on sparc only)
1148 --------------------------------------
1150 Module for AMD7930 sound chips found on Sparcs.
1152 Module supports up to 8 cards.
1154 Module snd-sun-cs4231 (on sparc only)
1155 -------------------------------------
1157 Module for CS4231 sound chips found on Sparcs.
1159 Module supports up to 8 cards.
1161 Module snd-wavefront
1162 --------------------
1164 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1166 cs4232_pcm_port - Port # for CS4232 PCM interface.
1167 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1168 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1169 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1170 use_cs4232_midi - Use CS4232 MPU-401 interface
1171 (inaccessibly located inside your computer)
1172 ics2115_port - Port # for ICS2115
1173 ics2115_irq - IRQ # for ICS2115
1174 fm_port - FM OPL-3 Port #
1175 dma1 - DMA1 # for CS4232 PCM interface.
1176 dma2 - DMA2 # for CS4232 PCM interface.
1177 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1179 Module supports up to 8 cards and ISA PnP.
1181 Module snd-sonicvibes
1182 ---------------------
1184 Module for S3 SonicVibes PCI sound cards.
1185 * PINE Schubert 32 PCI
1187 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1188 - SoundCard must have onboard SRAM for this.
1189 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1191 Module supports up to 8 cards and autoprobe.
1193 Module snd-serial-u16550
1194 ------------------------
1196 Module for UART16550A serial MIDI ports.
1198 port - port # for UART16550A chip
1199 irq - IRQ # for UART16550A chip, -1 = poll mode
1200 speed - speed in bauds (9600,19200,38400,57600,115200)
1202 base - base for divisor in bauds (57600,115200,230400,460800)
1204 outs - number of MIDI ports in a serial port (1-4)
1206 adaptor - Type of adaptor.
1207 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1208 3 = MS-124W M/B, 4 = Generic
1210 Module supports up to 8 cards. This module does not support autoprobe
1211 thus the main port must be specified!!! Other options are optional.
1216 Module for Trident 4DWave DX/NX sound cards.
1217 * Best Union Miss Melody 4DWave PCI
1219 * Warpspeed ONSpeed 4DWave PCI
1222 * CHIC True Sound 4Dwave
1223 * Shark Predator4D-PCI
1224 * Jaton SonicWave 4D
1226 pcm_channels - max channels (voices) reserved for PCM
1227 wavetable_size - max wavetable size in kB (4-?kb)
1229 Module supports up to 8 cards and autoprobe.
1231 The power-management is supported.
1233 Module snd-usb-audio
1234 --------------------
1236 Module for USB audio and USB MIDI devices.
1238 vid - Vendor ID for the device (optional)
1239 pid - Product ID for the device (optional)
1241 This module supports up to 8 cards, autoprobe and hotplugging.
1243 Module snd-usb-usx2y
1244 --------------------
1246 Module for Tascam USB US-122, US-224 and US-428 devices.
1248 This module supports up to 8 cards, autoprobe and hotplugging.
1250 Note: you need to load the firmware via usx2yloader utility included
1251 in alsa-tools and alsa-firmware packages.
1256 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1257 8233A, 8233C, 8235, 8237 (south) bridge.
1259 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1261 joystick - Enable joystick (default off) [VIA686A/686B only]
1262 ac97_clock - AC'97 codec clock base (default 48000Hz)
1263 dxs_support - support DXS channels,
1264 0 = auto (default), 1 = enable, 2 = disable,
1265 3 = 48k only, 4 = no VRA, 5 = enable any sample
1266 rate and different sample rates on different
1268 [VIA8233/C, 8235, 8237 only]
1269 ac97_quirk - AC'97 workaround for strange hardware
1270 See the description of intel8x0 module for details.
1272 Module supports autoprobe and multiple bus-master chips (max 8).
1274 Note: on some SMP motherboards like MSI 694D the interrupts might
1275 not be generated properly. In such a case, please try to
1276 set the SMP (or MPS) version on BIOS to 1.1 instead of
1277 default value 1.4. Then the interrupt number will be
1278 assigned under 15. You might also upgrade your BIOS.
1280 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1281 channels as the first PCM. On these channels, up to 4
1282 streams can be played at the same time, and the controller
1283 can perform sample rate conversion with separate rates for
1285 As default (dxs_support = 0), 48k fixed rate is chosen
1286 except for the known devices since the output is often
1287 noisy except for 48k on some mother boards due to the
1289 Please try once dxs_support=5 and if it works on other
1290 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1291 know the PCI subsystem vendor/device id's (output of
1293 If dxs_support=5 does not work, try dxs_support=4; if it
1294 doesn't work too, try dxs_support=1. (dxs_support=1 is
1295 usually for old motherboards. The correct implementated
1296 board should work with 4 or 5.) If it still doesn't
1297 work and the default setting is ok, dxs_support=3 is the
1298 right choice. If the default setting doesn't work at all,
1299 try dxs_support=2 to disable the DXS channels.
1300 In any cases, please let us know the result and the
1301 subsystem vendor/device ids.
1303 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1304 additonally. The mpu_port option is for VIA686 chips only.
1306 Module snd-via82xx-modem
1307 ------------------------
1309 Module for VIA82xx AC97 modem
1311 ac97_clock - AC'97 codec clock base (default 48000Hz)
1313 Module supports up to 8 cards.
1315 Note: The default index value of this module is -2, i.e. the first
1321 Module for virtual rawmidi devices.
1322 This module creates virtual rawmidi devices which communicate
1323 to the corresponding ALSA sequencer ports.
1325 midi_devs - MIDI devices # (1-8, default=4)
1327 Module supports up to 8 cards.
1332 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1334 mic - Enable Microphone on V222 Mic (NYI)
1335 ibl - Capture IBL size. (default = 0, minimum size)
1337 Module supports up to 8 cards.
1339 When the driver is compiled as a module and the hotplug firmware
1340 is supported, the firmware data is loaded via hotplug automatically.
1341 Install the necessary firmware files in alsa-firmware package.
1342 When no hotplug fw loader is available, you need to load the
1343 firmware via vxloader utility in alsa-tools package. To invoke
1344 vxloader automatically, add the following to /etc/modprobe.conf
1346 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1348 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1349 /etc/modules.conf, instead.)
1350 IBL size defines the interrupts period for PCM. The smaller size
1351 gives smaller latency but leads to more CPU consumption, too.
1352 The size is usually aligned to 126. As default (=0), the smallest
1353 size is chosen. The possible IBL values can be found in
1354 /proc/asound/cardX/vx-status proc file.
1359 Module for Digigram VX-Pocket VX2 PCMCIA card.
1361 ibl - Capture IBL size. (default = 0, minimum size)
1363 Module supports up to 8 cards. The module is compiled only when
1364 PCMCIA is supported on kernel.
1366 To activate the driver via the card manager, you'll need to set
1367 up /etc/pcmcia/vxpocket.conf. See the sound/pcmcia/vx/vxpocket.c.
1369 When the driver is compiled as a module and the hotplug firmware
1370 is supported, the firmware data is loaded via hotplug automatically.
1371 Install the necessary firmware files in alsa-firmware package.
1372 When no hotplug fw loader is available, you need to load the
1373 firmware via vxloader utility in alsa-tools package.
1375 About capture IBL, see the description of snd-vx222 module.
1377 Note: the driver is build only when CONFIG_ISA is set.
1382 Module for Digigram VX-Pocket 440 PCMCIA card.
1384 ibl - Capture IBL size. (default = 0, minimum size)
1386 Module supports up to 8 cards. The module is compiled only when
1387 PCMCIA is supported on kernel.
1389 To activate the driver via the card manager, you'll need to set
1390 up /etc/pcmcia/vxp440.conf. See the sound/pcmcia/vx/vxp440.c.
1392 When the driver is compiled as a module and the hotplug firmware
1393 is supported, the firmware data is loaded via hotplug automatically.
1394 Install the necessary firmware files in alsa-firmware package.
1395 When no hotplug fw loader is available, you need to load the
1396 firmware via vxloader utility in alsa-tools package.
1398 About capture IBL, see the description of snd-vx222 module.
1400 Note: the driver is build only when CONFIG_ISA is set.
1405 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1407 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1408 1 (auto-detect for YMF744/754 only)
1409 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1410 1 (auto-detect for YMF744/754 only)
1411 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1413 rear_switch - enable shared rear/line-in switch (bool)
1415 Module supports autoprobe and multiple chips (max 8).
1417 The power-management is supported.
1419 Module snd-pdaudiocf
1420 --------------------
1422 Module for Sound Core PDAudioCF sound card.
1424 Note: the driver is build only when CONFIG_ISA is set.
1427 Configuring Non-ISAPNP Cards
1428 ============================
1430 When the kernel is configured with ISA-PnP support, the modules
1431 supporting the isapnp cards will have module options "isapnp".
1432 If this option is set, *only* the ISA-PnP devices will be probed.
1433 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1434 together with the proper i/o and irq configuration.
1436 When the kernel is configured without ISA-PnP support, isapnp option
1437 will be not built in.
1440 Module Autoloading Support
1441 ==========================
1443 The ALSA drivers can be loaded automatically on demand by defining
1444 module aliases. The string 'snd-card-%1' is requested for ALSA native
1445 devices where %i is sound card number from zero to seven.
1447 To auto-load an ALSA driver for OSS services, define the string
1448 'sound-slot-%i' where %i means the slot number for OSS, which
1449 corresponds to the card index of ALSA. Usually, define this
1450 as the the same card module.
1452 An example configuration for a single emu10k1 card is like below:
1453 ----- /etc/modprobe.conf
1454 alias snd-card-0 snd-emu10k1
1455 alias sound-slot-0 snd-emu10k1
1456 ----- /etc/modprobe.conf
1458 The available number of auto-loaded sound cards depends on the module
1459 option "cards_limit" of snd module. As default it's set to 1.
1460 To enable the auto-loading of multiple cards, specify the number of
1461 sound cards in that option.
1463 When multiple cards are available, it'd better to specify the index
1464 number for each card via module option, too, so that the order of
1465 cards is kept consistent.
1467 An example configuration for two sound cards is like below:
1469 ----- /etc/modprobe.conf
1471 options snd cards_limit=2
1472 alias snd-card-0 snd-interwave
1473 alias snd-card-1 snd-ens1371
1474 options snd-interwave index=0
1475 options snd-ens1371 index=1
1477 alias sound-slot-0 snd-interwave
1478 alias sound-slot-1 snd-ens1371
1479 ----- /etc/moprobe.conf
1481 In this example, the interwave card is always loaded as the first card
1482 (index 0) and ens1371 as the second (index 1).
1485 ALSA PCM devices to OSS devices mapping
1486 =======================================
1488 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1489 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1490 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1491 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1492 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1493 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1494 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1495 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1496 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1498 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1499 sound card number and second means device number. The ALSA devices
1500 have either 'c' or 'p' suffix indicating the direction, capture and
1501 playback, respectively.
1503 Please note that the device mapping above may be varied via the module
1504 options of snd-pcm-oss module.
1510 The ALSA driver fully supports the devfs extension.
1511 You should add lines below to your devfsd.conf file:
1513 LOOKUP snd MODLOAD ACTION snd
1514 REGISTER ^sound/.* PERMISSIONS root.audio 660
1515 REGISTER ^snd/.* PERMISSIONS root.audio 660
1517 Warning: These lines assume that you have the audio group in your system.
1518 Otherwise replace audio word with another group name (root for
1522 Proc interfaces (/proc/asound)
1523 ==============================
1525 /proc/asound/card#/pcm#[cp]/oss
1526 -------------------------------
1527 String "erase" - erase all additional informations about OSS applications
1528 String "<app_name> <fragments> <fragment_size> [<options>]"
1530 <app_name> - name of application with (higher priority) or without path
1531 <fragments> - number of fragments or zero if auto
1532 <fragment_size> - size of fragment in bytes or zero if auto
1533 <options> - optional parameters
1534 - disable the application tries to open a pcm device for
1535 this channel but does not want to use it.
1536 (Cause a bug or mmap needs)
1537 It's good for Quake etc...
1538 - direct don't use plugins
1539 - block force block mode (rvplayer)
1540 - non-block force non-block mode
1541 - whole-frag write only whole fragments (optimization affecting
1543 - no-silence do not fill silence ahead to avoid clicks
1545 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1546 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1547 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1550 Early Buffer Allocation
1551 =======================
1553 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1554 sometimes it's too late to find such spaces when the driver module is
1555 actually loaded due to memory fragmentation. You can pre-allocate the
1556 PCM buffers by loading snd-page-alloc module and write commands to its
1557 proc file in prior, for example, in the early boot stage like
1558 /etc/init.d/*.local scripts.
1560 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1561 usage of page allocation. In writing, you can send the following
1562 commands to the snd-page-alloc driver:
1564 - add VENDOR DEVICE MASK SIZE BUFFERS
1566 VENDOR and DEVICE are PCI vendor and device IDs. They take
1567 integer numbers (0x prefix is needed for the hex).
1568 MASK is the PCI DMA mask. Pass 0 if not restricted.
1569 SIZE is the size of each buffer to allocate. You can pass
1570 k and m suffix for KB and MB. The max number is 16MB.
1571 BUFFERS is the number of buffers to allocate. It must be greater
1572 than 0. The max number is 4.
1576 This will erase the all pre-allocated buffers which are not in
1583 ALSA project homepage
1584 http://www.alsa-project.org
git://ftp.safe.ca / safe / jmp / linux-2.6 / blob