pcm.!default { type plug slave { pcm "hw:0,3" rate 48000 format S16_LE } }
you should not override pcm.default since your does not have any capture device on hw:0,3
pcm.!default {
type plug slave {
pcm "hw:0,3"
rate 48000
format S16_LE
}
}
you should not override pcm.default since your does not have any capture device on hw:0,3