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