Default card for Alsasound on the Pi (Rasbian)

Sound levels adjust with alsamixer.

From answer here, changing the default card:

  • Find your attached card with :
    cat /proc/asound/cards
  • Add or update /etc/asound.conf with:
    pcm.!default {
        type hw
        card 1
    }
    
    ctl.!default {
        type hw           
        card 1
    }

Change card number to match.

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