thanks a lot for your reply!
I already tried around a little, and with the same hardware, running a Volumio image, I have no trouble at all. So I would say, the problem should neither be the hardware, nor the connection between the Pi and the TV. Additionally, Kodi is turned off in my setup.
So I would really guess that it is a configuration problem of the Max2Play image.
If you have any further suggestions or an opinion different from mine, please let me know 😉
Nevertheless you’re quite right: The Pi-DAC+-combo works great!