Audigy 2 and 5.1 creative speakers. All were working OK then Nothing apart from a quick run through the Creative Diagnostic which showed sound coming fropm the rear right speaker but non of the others. No 'mute' switches on anywhere. All wires correctly in position. Computer used by all family so I do not know what may have been done by accident but nothing obvious. Can anyone please return noise to my strangely disturbing silent life?