For selecting the audio output I wrote a little script.
#!/bin/bash if test $1 #check if parameter 1 / 0=auto, 1=analog, 2=hdmi is set then echo "Try to select sound Interface:" $1 sudo amixer cset numid=3 $1 else echo " select interface :" echo "0=auto" echo "1=analog" echo "2=hdmi" read -p "Which interface should be used? " interfaceID echo "Try to select sound Interface:" $interfaceID sudo amixer cset numid=3 interfaceID fi