How do you change the sound output setting in the Arcam AVR360? I used to have this but couldn't figure how how to set the output. An example is I wanted all non Dolby digital 5.1 as pro logic 2 movie. Digital 5.1 etc would be that. For music I wanted 5 channel stereo/all channel stereo. When using my Xbox 360 I could not figure how to change output to all channel stereo or prolific 2 music. I'd listen to CDs or audio streaming and only got 2 channel. Xbox outputs Dolby digital but plays music in 2 channel only. So in the Arcam AVR360 I couldn't figure out how to select all channel stereo or pro logic 2 music.