Set the volume of several airplay speakers individually

Forked-daapd supports output to several shairplay speakers. To set the volume of each speaker from the command-line this helper tool is useful.

You need to install python-mpd2 first:

pip install python-mpd2

The speakers name is Audio-1 and the desired volume is 60:

python /home/tom/bin/output.py "Audio-1" 60