11da177e4SLinus Torvalds# ALSA soundcard-configuration 21da177e4SLinus Torvaldsconfig SND_TIMER 31da177e4SLinus Torvalds tristate 41da177e4SLinus Torvalds 51da177e4SLinus Torvaldsconfig SND_PCM 61da177e4SLinus Torvalds tristate 71da177e4SLinus Torvalds select SND_TIMER 81da177e4SLinus Torvalds 91da177e4SLinus Torvaldsconfig SND_HWDEP 101da177e4SLinus Torvalds tristate 111da177e4SLinus Torvalds 121da177e4SLinus Torvaldsconfig SND_RAWMIDI 131da177e4SLinus Torvalds tristate 141da177e4SLinus Torvalds 150d94e41aSMark Brown# To be effective this also requires INPUT - users should say: 160d94e41aSMark Brown# select SND_JACK if INPUT=y || INPUT=SND 170d94e41aSMark Brown# to avoid having to force INPUT on. 180d94e41aSMark Brownconfig SND_JACK 190d94e41aSMark Brown bool 200d94e41aSMark Brown 211da177e4SLinus Torvaldsconfig SND_SEQUENCER 221da177e4SLinus Torvalds tristate "Sequencer support" 231da177e4SLinus Torvalds select SND_TIMER 241da177e4SLinus Torvalds help 251da177e4SLinus Torvalds Say Y or M to enable MIDI sequencer and router support. This 261da177e4SLinus Torvalds feature allows routing and enqueueing of MIDI events. Events 271da177e4SLinus Torvalds can be processed at a given time. 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds Many programs require this feature, so you should enable it 301da177e4SLinus Torvalds unless you know what you're doing. 311da177e4SLinus Torvalds 321da177e4SLinus Torvaldsconfig SND_SEQ_DUMMY 331da177e4SLinus Torvalds tristate "Sequencer dummy client" 341da177e4SLinus Torvalds depends on SND_SEQUENCER 351da177e4SLinus Torvalds help 361da177e4SLinus Torvalds Say Y here to enable the dummy sequencer client. This client 371da177e4SLinus Torvalds is a simple MIDI-through client: all normal input events are 381da177e4SLinus Torvalds redirected to the output port immediately. 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds You don't need this unless you want to connect many MIDI 411da177e4SLinus Torvalds devices or applications together. 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 441da177e4SLinus Torvalds will be called snd-seq-dummy. 451da177e4SLinus Torvalds 461da177e4SLinus Torvaldsconfig SND_OSSEMUL 47d886e87cSTejun Heo select SOUND_OSS_CORE 481da177e4SLinus Torvalds bool 491da177e4SLinus Torvalds 501da177e4SLinus Torvaldsconfig SND_MIXER_OSS 511da177e4SLinus Torvalds tristate "OSS Mixer API" 521da177e4SLinus Torvalds select SND_OSSEMUL 531da177e4SLinus Torvalds help 541da177e4SLinus Torvalds To enable OSS mixer API emulation (/dev/mixer*), say Y here 551da177e4SLinus Torvalds and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 601da177e4SLinus Torvalds will be called snd-mixer-oss. 611da177e4SLinus Torvalds 621da177e4SLinus Torvaldsconfig SND_PCM_OSS 631da177e4SLinus Torvalds tristate "OSS PCM (digital audio) API" 641da177e4SLinus Torvalds select SND_OSSEMUL 651da177e4SLinus Torvalds select SND_PCM 661da177e4SLinus Torvalds help 671da177e4SLinus Torvalds To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 681da177e4SLinus Torvalds here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 731da177e4SLinus Torvalds will be called snd-pcm-oss. 741da177e4SLinus Torvalds 7521a3479aSJaroslav Kyselaconfig SND_PCM_OSS_PLUGINS 7621a3479aSJaroslav Kysela bool "OSS PCM (digital audio) API - Include plugin system" 7721a3479aSJaroslav Kysela depends on SND_PCM_OSS 7821a3479aSJaroslav Kysela default y 7921a3479aSJaroslav Kysela help 8021a3479aSJaroslav Kysela If you disable this option, the ALSA's OSS PCM API will not 8121a3479aSJaroslav Kysela support conversion of channels, formats and rates. It will 8221a3479aSJaroslav Kysela behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 8321a3479aSJaroslav Kysela 841da177e4SLinus Torvaldsconfig SND_SEQUENCER_OSS 851da177e4SLinus Torvalds bool "OSS Sequencer API" 8689fe5117STakashi Iwai depends on SND_SEQUENCER 871da177e4SLinus Torvalds select SND_OSSEMUL 881da177e4SLinus Torvalds help 891da177e4SLinus Torvalds Say Y here to enable OSS sequencer emulation (both 901da177e4SLinus Torvalds /dev/sequencer and /dev/music interfaces). 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 931da177e4SLinus Torvalds 94c2f60c52SFrederik Deweerdt If you choose M in "Sequencer support" (SND_SEQUENCER), 95c2f60c52SFrederik Deweerdt this will be compiled as a module. The module will be called 96c2f60c52SFrederik Deweerdt snd-seq-oss. 971da177e4SLinus Torvalds 98bbaf5e97STakashi Iwaiconfig SND_HRTIMER 99bbaf5e97STakashi Iwai tristate "HR-timer backend support" 100bbaf5e97STakashi Iwai depends on HIGH_RES_TIMERS 101bbaf5e97STakashi Iwai select SND_TIMER 102bbaf5e97STakashi Iwai help 103bbaf5e97STakashi Iwai Say Y here to enable HR-timer backend for ALSA timer. ALSA uses 104bbaf5e97STakashi Iwai the hrtimer as a precise timing source. The ALSA sequencer code 105bbaf5e97STakashi Iwai also can use this timing source. 106bbaf5e97STakashi Iwai 107bbaf5e97STakashi Iwai To compile this driver as a module, choose M here: the module 108bbaf5e97STakashi Iwai will be called snd-hrtimer. 109bbaf5e97STakashi Iwai 110bbaf5e97STakashi Iwaiconfig SND_SEQ_HRTIMER_DEFAULT 111bbaf5e97STakashi Iwai bool "Use HR-timer as default sequencer timer" 112bbaf5e97STakashi Iwai depends on SND_HRTIMER && SND_SEQUENCER 113bbaf5e97STakashi Iwai default y 114bbaf5e97STakashi Iwai help 115bbaf5e97STakashi Iwai Say Y here to use the HR-timer backend as the default sequencer 116bbaf5e97STakashi Iwai timer. 117bbaf5e97STakashi Iwai 1181da177e4SLinus Torvaldsconfig SND_RTCTIMER 1191da177e4SLinus Torvalds tristate "RTC Timer support" 12089fe5117STakashi Iwai depends on RTC 1211da177e4SLinus Torvalds select SND_TIMER 1221da177e4SLinus Torvalds help 1231da177e4SLinus Torvalds Say Y here to enable RTC timer support for ALSA. ALSA uses 1241da177e4SLinus Torvalds the RTC timer as a precise timing source and maps the RTC 1251da177e4SLinus Torvalds timer to ALSA's timer interface. The ALSA sequencer code also 1261da177e4SLinus Torvalds can use this timing source. 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 1291da177e4SLinus Torvalds will be called snd-rtctimer. 1301da177e4SLinus Torvalds 13152948b3fSTakashi Iwai Note that this option is exclusive with the new RTC drivers 13252948b3fSTakashi Iwai (CONFIG_RTC_CLASS) since this requires the old API. 13352948b3fSTakashi Iwai 134a4f508b2SClemens Ladischconfig SND_SEQ_RTCTIMER_DEFAULT 135a4f508b2SClemens Ladisch bool "Use RTC as default sequencer timer" 136a4f508b2SClemens Ladisch depends on SND_RTCTIMER && SND_SEQUENCER 137e78a37bcSTakashi Iwai depends on !SND_SEQ_HRTIMER_DEFAULT 138a4f508b2SClemens Ladisch default y 139a4f508b2SClemens Ladisch help 140a4f508b2SClemens Ladisch Say Y here to use the RTC timer as the default sequencer 141a4f508b2SClemens Ladisch timer. This is strongly recommended because it ensures 142a4f508b2SClemens Ladisch precise MIDI timing even when the system timer runs at less 143a4f508b2SClemens Ladisch than 1000 Hz. 144a4f508b2SClemens Ladisch 145a4f508b2SClemens Ladisch If in doubt, say Y. 146a4f508b2SClemens Ladisch 147332682b1SClemens Ladischconfig SND_DYNAMIC_MINORS 148b10e5391SClemens Ladisch bool "Dynamic device file minor numbers" 149332682b1SClemens Ladisch help 150332682b1SClemens Ladisch If you say Y here, the minor numbers of ALSA device files in 151332682b1SClemens Ladisch /dev/snd/ are allocated dynamically. This allows you to have 152332682b1SClemens Ladisch more than 8 sound cards, but requires a dynamic device file 153332682b1SClemens Ladisch system like udev. 154332682b1SClemens Ladisch 155332682b1SClemens Ladisch If you are unsure about this, say N here. 156332682b1SClemens Ladisch 15759d48582STakashi Iwaiconfig SND_SUPPORT_OLD_API 15859d48582STakashi Iwai bool "Support old ALSA API" 15959d48582STakashi Iwai default y 16059d48582STakashi Iwai help 16159d48582STakashi Iwai Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 16259d48582STakashi Iwai or older). 16359d48582STakashi Iwai 16421a3479aSJaroslav Kyselaconfig SND_VERBOSE_PROCFS 16521a3479aSJaroslav Kysela bool "Verbose procfs contents" 16689fe5117STakashi Iwai depends on PROC_FS 16721a3479aSJaroslav Kysela default y 16821a3479aSJaroslav Kysela help 16921a3479aSJaroslav Kysela Say Y here to include code for verbose procfs contents (provides 170a982ac06SMatt LaPlante useful information to developers when a problem occurs). On the 17121a3479aSJaroslav Kysela other side, it makes the ALSA subsystem larger. 17221a3479aSJaroslav Kysela 1731da177e4SLinus Torvaldsconfig SND_VERBOSE_PRINTK 1741da177e4SLinus Torvalds bool "Verbose printk" 1751da177e4SLinus Torvalds help 1761da177e4SLinus Torvalds Say Y here to enable verbose log messages. These messages 1771da177e4SLinus Torvalds will help to identify source file and position containing 1781da177e4SLinus Torvalds printed messages. 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds You don't need this unless you're debugging ALSA. 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvaldsconfig SND_DEBUG 1831da177e4SLinus Torvalds bool "Debug" 1841da177e4SLinus Torvalds help 1851da177e4SLinus Torvalds Say Y here to enable ALSA debug code. 1861da177e4SLinus Torvalds 18762cf872aSTakashi Iwaiconfig SND_DEBUG_VERBOSE 18862cf872aSTakashi Iwai bool "More verbose debug" 1891da177e4SLinus Torvalds depends on SND_DEBUG 1901da177e4SLinus Torvalds help 19162cf872aSTakashi Iwai Say Y here to enable extra-verbose debugging messages. 19262cf872aSTakashi Iwai 19362cf872aSTakashi Iwai Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. 19462cf872aSTakashi Iwai So, say Y only if you are ready to be annoyed. 19561fb63c0SJaroslav Kysela 19661fb63c0SJaroslav Kyselaconfig SND_PCM_XRUN_DEBUG 19761fb63c0SJaroslav Kysela bool "Enable PCM ring buffer overrun/underrun debugging" 19861fb63c0SJaroslav Kysela default n 199b7d90a35STakashi Iwai depends on SND_DEBUG && SND_VERBOSE_PROCFS 20061fb63c0SJaroslav Kysela help 20161fb63c0SJaroslav Kysela Say Y to enable the PCM ring buffer overrun/underrun debugging. 20261fb63c0SJaroslav Kysela It is usually not required, but if you have trouble with 20361fb63c0SJaroslav Kysela sound clicking when system is loaded, it may help to determine 20461fb63c0SJaroslav Kysela the process or driver which causes the scheduling gaps. 205e922b002STakashi Iwai 206e922b002STakashi Iwaiconfig SND_VMASTER 207e922b002STakashi Iwai bool 208