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.