Hi Visage,
I'm glad the problem has been resolved. I just have a couple of questions to help me clarify what happened when you saw that the audio was gone. I'd like to know just in case there is a bug hiding under the surface which needs fixing.
1. Were there any waveforms drawn in the clips, or were they completely blank?
2. Had you recently moved any files from the project directory?
3. Did you try and play the project, and if so, did you hear anything?
Regards,
Ben