Help! I can't for the life of me work out what I've done wrong but I can't get any of my exs sequences to play back despite being able to play them and record them normally from the keyboard. I think maybe I've hit a key command unknowingly and toggled some playback switch. When I press play the little midi meter next to the track shows activity but there's no audio output. All other midi tracks play back normally. Any help would be gratefully received Chris Nightingale System: Logic Audio 4.61 Mac G4 500 MOTU 2408/ MIDI timepiece Oasys PCI board