the mentioned link worked for me so far – using the ADC with an „logitech bluetooth adapter“/“direct-line-in“ by mobile phone.
Be carful about the wavin-favourite-url which has to be namend „wavin:sysdefault“ instead of „wavin:default“ in my case – as this is the name of my card named under „audioplayer/advanced options/soundcard“ in max2play.
Sound has a lag of up to 5 sec before starting/stopping playback. / Volume-output on mobile-phone has to be very low, otherwise there will be peaks & scratches in the playback – this might be solved in regulating the inputpeak somewhere, but i haven’t found the option yet.