Set up the above for one of my gardening customers. When playing a certain DVD (not all) Getting music coming out of all speakers but voice only out of one, Is that likely to be the way they have recorded the dvd.

Speakers are connected to the DVD player using the simple speaker wire spring connections (not jack plugs) (subwoofer, centre speaker, 2 front 2 rear) . Music cds seem to be fine.

yes that'll be correct. It'll be the center with the voice coming out. Should be anyway.

These DVD surround systems can be really quite crap compared to a proper AV Receiver system.