1# ALSA soundcard-configuration 2config SND_TIMER 3 tristate 4 depends on SND 5 6config SND_PCM 7 tristate 8 select SND_TIMER 9 depends on SND 10 11config SND_HWDEP 12 tristate 13 depends on SND 14 15config SND_RAWMIDI 16 tristate 17 depends on SND 18 19config SND_SEQUENCER 20 tristate "Sequencer support" 21 depends on SND 22 select SND_TIMER 23 help 24 Say Y or M to enable MIDI sequencer and router support. This 25 feature allows routing and enqueueing of MIDI events. Events 26 can be processed at a given time. 27 28 Many programs require this feature, so you should enable it 29 unless you know what you're doing. 30 31config SND_SEQ_DUMMY 32 tristate "Sequencer dummy client" 33 depends on SND_SEQUENCER 34 help 35 Say Y here to enable the dummy sequencer client. This client 36 is a simple MIDI-through client: all normal input events are 37 redirected to the output port immediately. 38 39 You don't need this unless you want to connect many MIDI 40 devices or applications together. 41 42 To compile this driver as a module, choose M here: the module 43 will be called snd-seq-dummy. 44 45config SND_OSSEMUL 46 bool 47 depends on SND 48 49config SND_MIXER_OSS 50 tristate "OSS Mixer API" 51 depends on SND 52 select SND_OSSEMUL 53 help 54 To enable OSS mixer API emulation (/dev/mixer*), say Y here 55 and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 56 57 Many programs still use the OSS API, so say Y. 58 59 To compile this driver as a module, choose M here: the module 60 will be called snd-mixer-oss. 61 62config SND_PCM_OSS 63 tristate "OSS PCM (digital audio) API" 64 depends on SND 65 select SND_OSSEMUL 66 select SND_PCM 67 help 68 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 69 here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 70 71 Many programs still use the OSS API, so say Y. 72 73 To compile this driver as a module, choose M here: the module 74 will be called snd-pcm-oss. 75 76config SND_PCM_OSS_PLUGINS 77 bool "OSS PCM (digital audio) API - Include plugin system" 78 depends on SND_PCM_OSS 79 default y 80 help 81 If you disable this option, the ALSA's OSS PCM API will not 82 support conversion of channels, formats and rates. It will 83 behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 84 85config SND_SEQUENCER_OSS 86 bool "OSS Sequencer API" 87 depends on SND && SND_SEQUENCER 88 select SND_OSSEMUL 89 help 90 Say Y here to enable OSS sequencer emulation (both 91 /dev/sequencer and /dev/music interfaces). 92 93 Many programs still use the OSS API, so say Y. 94 95 If you choose M in "Sequencer support" (SND_SEQUENCER), 96 this will be compiled as a module. The module will be called 97 snd-seq-oss. 98 99config SND_RTCTIMER 100 tristate "RTC Timer support" 101 depends on SND && RTC 102 select SND_TIMER 103 help 104 Say Y here to enable RTC timer support for ALSA. ALSA uses 105 the RTC timer as a precise timing source and maps the RTC 106 timer to ALSA's timer interface. The ALSA sequencer code also 107 can use this timing source. 108 109 To compile this driver as a module, choose M here: the module 110 will be called snd-rtctimer. 111 112config SND_SEQ_RTCTIMER_DEFAULT 113 bool "Use RTC as default sequencer timer" 114 depends on SND_RTCTIMER && SND_SEQUENCER 115 default y 116 help 117 Say Y here to use the RTC timer as the default sequencer 118 timer. This is strongly recommended because it ensures 119 precise MIDI timing even when the system timer runs at less 120 than 1000 Hz. 121 122 If in doubt, say Y. 123 124config SND_DYNAMIC_MINORS 125 bool "Dynamic device file minor numbers" 126 depends on SND 127 help 128 If you say Y here, the minor numbers of ALSA device files in 129 /dev/snd/ are allocated dynamically. This allows you to have 130 more than 8 sound cards, but requires a dynamic device file 131 system like udev. 132 133 If you are unsure about this, say N here. 134 135config SND_SUPPORT_OLD_API 136 bool "Support old ALSA API" 137 depends on SND 138 default y 139 help 140 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 141 or older). 142 143config SND_VERBOSE_PROCFS 144 bool "Verbose procfs contents" 145 depends on SND && PROC_FS 146 default y 147 help 148 Say Y here to include code for verbose procfs contents (provides 149 useful information to developers when a problem occurs). On the 150 other side, it makes the ALSA subsystem larger. 151 152config SND_VERBOSE_PRINTK 153 bool "Verbose printk" 154 depends on SND 155 help 156 Say Y here to enable verbose log messages. These messages 157 will help to identify source file and position containing 158 printed messages. 159 160 You don't need this unless you're debugging ALSA. 161 162config SND_DEBUG 163 bool "Debug" 164 depends on SND 165 help 166 Say Y here to enable ALSA debug code. 167 168config SND_DEBUG_DETECT 169 bool "Debug detection" 170 depends on SND_DEBUG 171 help 172 Say Y here to enable extra-verbose log messages printed when 173 detecting devices. 174 175config SND_PCM_XRUN_DEBUG 176 bool "Enable PCM ring buffer overrun/underrun debugging" 177 default n 178 depends on SND_DEBUG && SND_VERBOSE_PROCFS 179 help 180 Say Y to enable the PCM ring buffer overrun/underrun debugging. 181 It is usually not required, but if you have trouble with 182 sound clicking when system is loaded, it may help to determine 183 the process or driver which causes the scheduling gaps. 184 185config SND_VMASTER 186 bool 187 depends on SND 188