I have just purchased my first album on iTunes, copied to the hub and the files appear (and play) but no audio comes out??? have checked all options ticked under audi/video output ie aac, dts etc. any suggestions?

Try this: - Setup / A/V options, and if you’re using HDMI or OPTICAL, disable AAC. Some players can’t handle AAC. Alternatively, convert your audio files to mp3 format.