Max2Play Home 2016 (en) › Forums › General Questions on Hardware and Max2Play Versions › Aim Ultimate USB audio 2.0 and max2play › Reply To: Aim Ultimate USB audio 2.0 and max2play
The correct login is user: pi pw: raspberry
If you want root rights, enter „su“ and the password is max2play.
The sound levels should be the same, have you used the option „USB sound card“ in Raspberry Settings?
You should see two different AirPlay sources, but can just play one at a time without iTunes.