doc: https://support.hifiberry.com/hc/en-us/articles/205377651-Configuring-Linux-4-x-or-higher

in /boot/config.txt:

1. Comment the line dtparam=audio=on
2. Add dtoverlay=hifiberry-dacplus

create /etc/asound.conf:

pcm.!default  {
 type hw card 0
}
ctl.!default {
 type hw card 0
}

Alternatives

Music, Sound, Multiroom

→ Аудио-карты, усилки