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119 lines
2.8 KiB
119 lines
2.8 KiB
#
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#
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# 当前配置文件生效后会产生如下效果
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# 1. 通过amixer controls,可以看到如下音量控制器,其中通过Master Volume控制的是主音量,
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# default_playback用于在唤醒的时候降低背景声音。
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# root@firefly:~# amixer controls
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# numid=1,iface=MIXER,name='Master Volume'
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# numid=2,iface=MIXER,name='Ch1 Volume'
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# numid=3,iface=MIXER,name='Ch2 Volume'
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# numid=4,iface=MIXER,name='default_playback'
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# numid=5,iface=MIXER,name='wakeup_playback'
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#
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# 2. 通过aplay播放音频文件时，会自动通过default_playback设备播放，即其他应用程序例如chrome播放音频的时候也会自动使用这个设备
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# 3. 通过amixer控制音量时候，无需通过-c指定声卡编号
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# 4. 通过amixer通过default_playback控制音量来实现唤醒时降低背景声音。
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# 5. 通过amixer通过Master控制音量来实现对系统音量大小的控制。
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#
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pcm.!default {
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type plug
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slave.pcm "default_playback"
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}
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ctl.!default {
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type hw
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card 2
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}
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pcm.default_playback {
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type softvol
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slave {
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pcm "xa8326"
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}
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control {
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name "default_playback"
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card 2
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}
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min_dB -40.0
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max_dB 0.0
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resolution 256
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}
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pcm.wakeup_playback {
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type softvol
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slave {
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pcm "xa8326"
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}
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control {
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name "wakeup_playback"
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card 2
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}
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min_dB -40.0
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max_dB 0.0
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resolution 256
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}
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# 放音设备
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pcm.xa8326 {
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type plug
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slave {
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pcm {
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type dmix
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ipc_key 321456 # any unique value
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ipc_key_add_uid true
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slave {
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pcm "hw:2,0"
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period_time 100000 # 100ms
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format S16_LE
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channels 2
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}
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}
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rate 48000
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format S16_LE
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channels 2
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}
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}
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# 重采样
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pcm.recorder {
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type plug
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slave {
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pcm {
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type multi
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slaves.xa8326.pcm "hw:2,0"
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slaves.xa8326.channels 2
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slaves.pdm.pcm "hw:1,0"
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slaves.pdm.channels 8
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bindings.0.slave pdm
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bindings.0.channel 0
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bindings.1.slave pdm
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bindings.1.channel 1
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bindings.2.slave pdm
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bindings.2.channel 2
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bindings.3.slave pdm
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bindings.3.channel 3
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bindings.4.slave xa8326
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bindings.4.channel 0
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# bindings.5.slave pdm
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# bindings.5.channel 5
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# bindings.6.slave pdm
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# bindings.6.channel 6
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# bindings.7.slave pdm
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# bindings.7.channel 7
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# bindings.8.slave xa8326
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# bindings.8.channel 0
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# bindings.9.slave xa8326
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# bindings.9.channel 1
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}
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rate 48000
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format S16_LE
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channels 5
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}
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}
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