I recently upgraded to a virb ultra 30 from a virb elite that I used for 3 years without seeing this muting issue. I import say 4 clips and all 4 clips have audio in the source files. I then combine all 4 clips into a single video in virb edit and the exported file, half the clips are muted. I returned to virb edit thinking maybe somehow the audio setting was on 0% for these clips. Nope, all clips at 100%. Even if I max that meter out, which I think is 200%, still no sound. Anyone else have this issue?