to get the Rotary Encoder on IQAudio-Cards working with Synchronisation of volume with Squeezebox Server (control with App / webinterface / rotary encoder) you need to add following to the command line options of Squeezelite (not dependend of build-in audio active /not active):
-o hw:CARD=IQaudIODAC -V Digital -Q
I also added this to the description of the Rotary Encoder now (in Beta).
Description of Parameters:
– The Parameter „-Q“ starts the synchronisation with the Squeezebox Server
– The Parameter „-V“ makes sure to use the correct alsamixer control
– The Parameter „-o“ uses the dircet hardware as audio output (needed to use volume control on alsa level)
Important: This will only work with the Squeezelite in Max2Play and not in other distributions!