| # ALSA soundcard-configuration |
| config SND_TIMER |
| tristate |
| |
| config SND_PCM |
| tristate |
| select SND_TIMER |
| |
| config SND_HWDEP |
| tristate |
| |
| config SND_RAWMIDI |
| tristate |
| |
| # To be effective this also requires INPUT - users should say: |
| # select SND_JACK if INPUT=y || INPUT=SND |
| # to avoid having to force INPUT on. |
| config SND_JACK |
| bool |
| |
| config SND_SEQUENCER |
| tristate "Sequencer support" |
| select SND_TIMER |
| help |
| Say Y or M to enable MIDI sequencer and router support. This |
| feature allows routing and enqueueing of MIDI events. Events |
| can be processed at a given time. |
| |
| Many programs require this feature, so you should enable it |
| unless you know what you're doing. |
| |
| config SND_SEQ_DUMMY |
| tristate "Sequencer dummy client" |
| depends on SND_SEQUENCER |
| help |
| Say Y here to enable the dummy sequencer client. This client |
| is a simple MIDI-through client: all normal input events are |
| redirected to the output port immediately. |
| |
| You don't need this unless you want to connect many MIDI |
| devices or applications together. |
| |
| To compile this driver as a module, choose M here: the module |
| will be called snd-seq-dummy. |
| |
| config SND_OSSEMUL |
| select SOUND_OSS_CORE |
| bool |
| |
| config SND_MIXER_OSS |
| tristate "OSS Mixer API" |
| select SND_OSSEMUL |
| help |
| To enable OSS mixer API emulation (/dev/mixer*), say Y here |
| and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. |
| |
| Many programs still use the OSS API, so say Y. |
| |
| To compile this driver as a module, choose M here: the module |
| will be called snd-mixer-oss. |
| |
| config SND_PCM_OSS |
| tristate "OSS PCM (digital audio) API" |
| select SND_OSSEMUL |
| select SND_PCM |
| help |
| To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y |
| here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. |
| |
| Many programs still use the OSS API, so say Y. |
| |
| To compile this driver as a module, choose M here: the module |
| will be called snd-pcm-oss. |
| |
| config SND_PCM_OSS_PLUGINS |
| bool "OSS PCM (digital audio) API - Include plugin system" |
| depends on SND_PCM_OSS |
| default y |
| help |
| If you disable this option, the ALSA's OSS PCM API will not |
| support conversion of channels, formats and rates. It will |
| behave like most of new OSS/Free drivers in 2.4/2.6 kernels. |
| |
| config SND_SEQUENCER_OSS |
| bool "OSS Sequencer API" |
| depends on SND_SEQUENCER |
| select SND_OSSEMUL |
| help |
| Say Y here to enable OSS sequencer emulation (both |
| /dev/sequencer and /dev/music interfaces). |
| |
| Many programs still use the OSS API, so say Y. |
| |
| If you choose M in "Sequencer support" (SND_SEQUENCER), |
| this will be compiled as a module. The module will be called |
| snd-seq-oss. |
| |
| config SND_HRTIMER |
| tristate "HR-timer backend support" |
| depends on HIGH_RES_TIMERS |
| select SND_TIMER |
| help |
| Say Y here to enable HR-timer backend for ALSA timer. ALSA uses |
| the hrtimer as a precise timing source. The ALSA sequencer code |
| also can use this timing source. |
| |
| To compile this driver as a module, choose M here: the module |
| will be called snd-hrtimer. |
| |
| config SND_SEQ_HRTIMER_DEFAULT |
| bool "Use HR-timer as default sequencer timer" |
| depends on SND_HRTIMER && SND_SEQUENCER |
| default y |
| help |
| Say Y here to use the HR-timer backend as the default sequencer |
| timer. |
| |
| config SND_RTCTIMER |
| tristate "RTC Timer support" |
| depends on RTC |
| select SND_TIMER |
| help |
| Say Y here to enable RTC timer support for ALSA. ALSA uses |
| the RTC timer as a precise timing source and maps the RTC |
| timer to ALSA's timer interface. The ALSA sequencer code also |
| can use this timing source. |
| |
| To compile this driver as a module, choose M here: the module |
| will be called snd-rtctimer. |
| |
| Note that this option is exclusive with the new RTC drivers |
| (CONFIG_RTC_CLASS) since this requires the old API. |
| |
| config SND_SEQ_RTCTIMER_DEFAULT |
| bool "Use RTC as default sequencer timer" |
| depends on SND_RTCTIMER && SND_SEQUENCER |
| depends on !SND_SEQ_HRTIMER_DEFAULT |
| default y |
| help |
| Say Y here to use the RTC timer as the default sequencer |
| timer. This is strongly recommended because it ensures |
| precise MIDI timing even when the system timer runs at less |
| than 1000 Hz. |
| |
| If in doubt, say Y. |
| |
| config SND_DYNAMIC_MINORS |
| bool "Dynamic device file minor numbers" |
| help |
| If you say Y here, the minor numbers of ALSA device files in |
| /dev/snd/ are allocated dynamically. This allows you to have |
| more than 8 sound cards, but requires a dynamic device file |
| system like udev. |
| |
| If you are unsure about this, say N here. |
| |
| config SND_COMPRESS_OFFLOAD |
| tristate "ALSA Compressed audio offload support" |
| default n |
| help |
| If you want support for offloading compressed audio and have such |
| a hardware, then you should say Y here and also to the DSP driver |
| of your platform. |
| |
| If you are unsure about this, say N here. |
| |
| config SND_SUPPORT_OLD_API |
| bool "Support old ALSA API" |
| default y |
| help |
| Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 |
| or older). |
| |
| config SND_VERBOSE_PROCFS |
| bool "Verbose procfs contents" |
| depends on PROC_FS |
| default y |
| help |
| Say Y here to include code for verbose procfs contents (provides |
| useful information to developers when a problem occurs). On the |
| other side, it makes the ALSA subsystem larger. |
| |
| config SND_VERBOSE_PRINTK |
| bool "Verbose printk" |
| help |
| Say Y here to enable verbose log messages. These messages |
| will help to identify source file and position containing |
| printed messages. |
| |
| You don't need this unless you're debugging ALSA. |
| |
| config SND_DEBUG |
| bool "Debug" |
| help |
| Say Y here to enable ALSA debug code. |
| |
| config SND_DEBUG_VERBOSE |
| bool "More verbose debug" |
| depends on SND_DEBUG |
| help |
| Say Y here to enable extra-verbose debugging messages. |
| |
| Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. |
| So, say Y only if you are ready to be annoyed. |
| |
| config SND_PCM_XRUN_DEBUG |
| bool "Enable PCM ring buffer overrun/underrun debugging" |
| default n |
| depends on SND_DEBUG && SND_VERBOSE_PROCFS |
| help |
| Say Y to enable the PCM ring buffer overrun/underrun debugging. |
| It is usually not required, but if you have trouble with |
| sound clicking when system is loaded, it may help to determine |
| the process or driver which causes the scheduling gaps. |
| |
| config SND_VMASTER |
| bool |
| |
| config SND_KCTL_JACK |
| bool |
| |
| config SND_DMA_SGBUF |
| def_bool y |
| depends on X86 |
| |
| source "sound/core/seq/Kconfig" |
