seeed-voicecard/asound_4mic.conf

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# The IPC key of dmix or dsnoop plugin must be unique
# If 555555 or 666666 is used by other processes, use another one
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# use samplerate to resample as speexdsp resample is bad
defaults.pcm.rate_converter "samplerate"
pcm.!default {
type asym
playback.pcm "playback"
capture.pcm "ac108"
}
pcm.playback {
type plug
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slave.pcm "hw:ALSA"
}
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# pcm.dmixed {
# type dmix
# slave.pcm "hw:0,0"
# ipc_key 555555
# }
pcm.ac108 {
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type plug
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slave.pcm "hw:seeed4micvoicec"
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}
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# pcm.multiapps {
# type dsnoop
# ac108-slavepcm "hw:1,0"
# ipc_key 666666
# }