I recorded a ~98 minute session for my students. It was fine - I edited it and saved it in standard .amad format.
Later, I came back to it to save it out to mp3. Three things were done or happened:
1) I had to reboot my USB 3 hub which the mic was plugged to. Amadeus gave me notice that the "device had died". I closed the message and everything seemed fine.
2) I set the information under "Sound -> Show Sound Info," including adding a graphic. It appeared still fine in the waveform editor, though I did not listen.
3) I saved again. It still appeared fine.
4) I used Tracks -> Convert Track to Mono
After #4, there was nothing but a flatline with apparently 60hz buzz.
5) I hit "undo". It brought back two channels of flatline with buzz. No sounds left!!!!
6) I closed it promptly with NO save. (I've learned my lesson before...)
7) Re-opened... two channels of flatline with just buzz



So, my questions are:
1) Is there any way to recover my now lost/corrupt sound file? I need to deliver the lesson tomorrow.
2) What did I do "wrong" that I can avoid so this will never happen again?
Thanks in advance,
Morgan