I imported and installed the codec suggested however that didn’t seem to make any difference. Is there more that I might need to do? One approach that I found did work when using .MOV files (albeit not 100%) was to rename the .MOV file to an .MP4 extension and then import that file into Project Media. From there I could then bring the .MP4 file into the Vegas editor and the audio track did indeed show and play. However, one drawback was the video and audio were out of sync by about 5 seconds. I can ungroup the video and audio and manually adjust video and audio to be in sync. Not ideal.
Any ideas on why audio and video would be out of sync? I’d rather avoid having to always do a manual resync for every Zi8 video I shoot.