options snd_rpi_googlevoicehat_soundcard index=0 pcm.softvol { type softvol slave.pcm dmix control { name Master card 0 } } pcm.micboost { type route slave.pcm dsnoop ttable { 0.0 30.0 1.1 30.0 } } pcm.!default { type asym playback.pcm "plug:softvol" capture.pcm "plug:micboost" } ctl.!default { type hw card 0 }