[SOLVED] No Playback

I am on Windows 10 and currently using Audacity 3.1.3.
I cannot get it to play back, even though the file clearly has sound in it.
I’m using headphones, which work fine.
I have rebooted my computer twice and restarted Audacity many times.
What other info can I provide?

problem solved.

How you solved it. :wink: