Having saved a project in video editor 4, I have reloaded it but found that all the audio tracks that were playing fine before the save now don't play, other than the final track placed. The tracks are showing on the audio line but there's no music. All the balances and mutes are set fine and a new track imported and placed works fine, all the rest are soundless. Any suggestions, I don't really want to have to do it all again.