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2026-03-17 19:54:53 -04:00

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# Use the Google Voice HAT soundcard as the primary device by name (card id is "sndrpigooglevoi")
options snd_rpi_googlevoicehat_soundcard index=0
# Mix multiple playback clients in software with a fixed low-cost format.
pcm.dmixer {
type dmix
ipc_key 1024
ipc_perm 0666
slave {
pcm "hw:0,0"
format S16_LE
rate 16000
channels 1
period_time 0
period_size 1024
buffer_size 4096
}
}
# TTS volume control (used by default playback path).
pcm.tts_softvol {
type softvol
slave.pcm "dmixer"
control {
name "TTSMaster"
card 0
}
min_dB -60.0
max_dB 12.0
}
# Horn volume control.
pcm.horn_softvol {
type softvol
slave.pcm "dmixer"
control {
name "HornMaster"
card 0
}
min_dB -60.0
max_dB 12.0
}
# Forwarded audio volume control.
pcm.forward_softvol {
type softvol
slave.pcm "dmixer"
control {
name "ForwardMaster"
card 0
}
min_dB -60.0
max_dB 12.0
}
# Per-source playback PCMs.
pcm.tts {
type plug
slave.pcm "tts_softvol"
}
pcm.horn {
type plug
slave.pcm "horn_softvol"
}
pcm.forward {
type plug
slave.pcm "forward_softvol"
}
# Capture alias used by rover config defaults.
pcm.rovermic {
type plug
slave.pcm "hw:0,0"
}
# Defaults: TTS direct playback + raw capture on the HAT.
pcm.!default {
type asym
playback.pcm "tts"
capture.pcm "rovermic"
}
ctl.!default {
type hw
card 0
}