I have a Garmin 340 Audio Panel that has a music input. It can be piped around all the seats or the P1 can isolate and it does audio mute on PTT press and TX receive so no problem listening to the radio. I plug my iPod in and away we go.
Nothing wrong listening to a bit of music. On long flights when I have no one to talk to it provides a little entertainment and better quality than the ADF on 1215!!