avs_mtk_voice/meta/meta-mediatek-aud/recipes-avs/avs-device-sdk/files/feier/asound.conf

pcm.!default {
    type plug
    slave.pcm "dmixer"
}
 
pcm.dmixer {
    type dmix
    ipc_key 1024
    slave {
        pcm "hw:0,0"
    }
    bindings {
        0 0
        1 1
    }
}
 
ctl.dmixer {
    type hw
    card 0
}