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1 | # ALSA soundcard-configuration |
2 | config SND_TIMER |
3 | tristate |
4 | |
5 | config SND_PCM |
6 | tristate |
7 | select SND_TIMER |
8 | select GCD |
9 | |
10 | config SND_HWDEP |
11 | tristate |
12 | |
13 | config SND_RAWMIDI |
14 | tristate |
15 | |
16 | # To be effective this also requires INPUT - users should say: |
17 | # select SND_JACK if INPUT=y || INPUT=SND |
18 | # to avoid having to force INPUT on. |
19 | config SND_JACK |
20 | bool |
21 | |
22 | config SND_SEQUENCER |
23 | tristate "Sequencer support" |
24 | select SND_TIMER |
25 | help |
26 | Say Y or M to enable MIDI sequencer and router support. This |
27 | feature allows routing and enqueueing of MIDI events. Events |
28 | can be processed at a given time. |
29 | |
30 | Many programs require this feature, so you should enable it |
31 | unless you know what you're doing. |
32 | |
33 | config SND_SEQ_DUMMY |
34 | tristate "Sequencer dummy client" |
35 | depends on SND_SEQUENCER |
36 | help |
37 | Say Y here to enable the dummy sequencer client. This client |
38 | is a simple MIDI-through client: all normal input events are |
39 | redirected to the output port immediately. |
40 | |
41 | You don't need this unless you want to connect many MIDI |
42 | devices or applications together. |
43 | |
44 | To compile this driver as a module, choose M here: the module |
45 | will be called snd-seq-dummy. |
46 | |
47 | config SND_OSSEMUL |
48 | select SOUND_OSS_CORE |
49 | bool |
50 | |
51 | config SND_MIXER_OSS |
52 | tristate "OSS Mixer API" |
53 | select SND_OSSEMUL |
54 | help |
55 | To enable OSS mixer API emulation (/dev/mixer*), say Y here |
56 | and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. |
57 | |
58 | Many programs still use the OSS API, so say Y. |
59 | |
60 | To compile this driver as a module, choose M here: the module |
61 | will be called snd-mixer-oss. |
62 | |
63 | config SND_PCM_OSS |
64 | tristate "OSS PCM (digital audio) API" |
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 | |
76 | config 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 | |
85 | config SND_SEQUENCER_OSS |
86 | bool "OSS Sequencer API" |
87 | depends on 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 | |
99 | config SND_HRTIMER |
100 | tristate "HR-timer backend support" |
101 | depends on HIGH_RES_TIMERS |
102 | select SND_TIMER |
103 | help |
104 | Say Y here to enable HR-timer backend for ALSA timer. ALSA uses |
105 | the hrtimer as a precise timing source. The ALSA sequencer code |
106 | also can use this timing source. |
107 | |
108 | To compile this driver as a module, choose M here: the module |
109 | will be called snd-hrtimer. |
110 | |
111 | config SND_SEQ_HRTIMER_DEFAULT |
112 | bool "Use HR-timer as default sequencer timer" |
113 | depends on SND_HRTIMER && SND_SEQUENCER |
114 | default y |
115 | help |
116 | Say Y here to use the HR-timer backend as the default sequencer |
117 | timer. |
118 | |
119 | config SND_RTCTIMER |
120 | tristate "RTC Timer support" |
121 | depends on RTC |
122 | select SND_TIMER |
123 | help |
124 | Say Y here to enable RTC timer support for ALSA. ALSA uses |
125 | the RTC timer as a precise timing source and maps the RTC |
126 | timer to ALSA's timer interface. The ALSA sequencer code also |
127 | can use this timing source. |
128 | |
129 | To compile this driver as a module, choose M here: the module |
130 | will be called snd-rtctimer. |
131 | |
132 | Note that this option is exclusive with the new RTC drivers |
133 | (CONFIG_RTC_CLASS) since this requires the old API. |
134 | |
135 | config SND_SEQ_RTCTIMER_DEFAULT |
136 | bool "Use RTC as default sequencer timer" |
137 | depends on SND_RTCTIMER && SND_SEQUENCER |
138 | depends on !SND_SEQ_HRTIMER_DEFAULT |
139 | default y |
140 | help |
141 | Say Y here to use the RTC timer as the default sequencer |
142 | timer. This is strongly recommended because it ensures |
143 | precise MIDI timing even when the system timer runs at less |
144 | than 1000 Hz. |
145 | |
146 | If in doubt, say Y. |
147 | |
148 | config SND_DYNAMIC_MINORS |
149 | bool "Dynamic device file minor numbers" |
150 | help |
151 | If you say Y here, the minor numbers of ALSA device files in |
152 | /dev/snd/ are allocated dynamically. This allows you to have |
153 | more than 8 sound cards, but requires a dynamic device file |
154 | system like udev. |
155 | |
156 | If you are unsure about this, say N here. |
157 | |
158 | config SND_SUPPORT_OLD_API |
159 | bool "Support old ALSA API" |
160 | default y |
161 | help |
162 | Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 |
163 | or older). |
164 | |
165 | config SND_VERBOSE_PROCFS |
166 | bool "Verbose procfs contents" |
167 | depends on PROC_FS |
168 | default y |
169 | help |
170 | Say Y here to include code for verbose procfs contents (provides |
171 | useful information to developers when a problem occurs). On the |
172 | other side, it makes the ALSA subsystem larger. |
173 | |
174 | config SND_VERBOSE_PRINTK |
175 | bool "Verbose printk" |
176 | help |
177 | Say Y here to enable verbose log messages. These messages |
178 | will help to identify source file and position containing |
179 | printed messages. |
180 | |
181 | You don't need this unless you're debugging ALSA. |
182 | |
183 | config SND_DEBUG |
184 | bool "Debug" |
185 | help |
186 | Say Y here to enable ALSA debug code. |
187 | |
188 | config SND_DEBUG_VERBOSE |
189 | bool "More verbose debug" |
190 | depends on SND_DEBUG |
191 | help |
192 | Say Y here to enable extra-verbose debugging messages. |
193 | |
194 | Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. |
195 | So, say Y only if you are ready to be annoyed. |
196 | |
197 | config SND_PCM_XRUN_DEBUG |
198 | bool "Enable PCM ring buffer overrun/underrun debugging" |
199 | default n |
200 | depends on SND_DEBUG && SND_VERBOSE_PROCFS |
201 | help |
202 | Say Y to enable the PCM ring buffer overrun/underrun debugging. |
203 | It is usually not required, but if you have trouble with |
204 | sound clicking when system is loaded, it may help to determine |
205 | the process or driver which causes the scheduling gaps. |
206 | |
207 | config SND_VMASTER |
208 | bool |
209 | |
210 | config SND_DMA_SGBUF |
211 | def_bool y |
212 | depends on X86 |
213 | |
214 | source "sound/core/seq/Kconfig" |
215 |
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