Just experienced some weirdness with Avid. I used the full audio file and had Avid use its Read Audio TC tool. The aux TC came out the same as Dave’s numbers. But when I made a subclip from the audio and ran it through Read Audio TC, the timecode was one second advanced (like the numbers I first posted).
I made subclips because the aux TC on channel 5 does break. And with Avid media, you can’t have any kind of TC break or you’ll have problems.
Since the aux TC is just LTC, would something like LibLTC over at Github help?