Double check that you're recording on all channels before begining a podcast.
All the remote audio capture for Frontier episode 29 is gone.
First fail was due to operator error:
Bad start, but good thing for backups
All audio passing in and out of the workstations audio interface gets captured to a Zoom H4n hardware audio recorder as a backup.
Then the second fail. This time due to a corrupted SD card.
Never just accept what Finder shows you. Launch the Terminal.
The recoverd file ended up like this:
TL;DR SD cards are unreliable. Measure twice, cut once.