Have a new 500x. Was hooked up to computer trying different presets to record. Was using the factory installed ones and was tweaking them. A few strums and playback on QT to check them out. Did that a few times.
Picked one to play back and left others alone.
Turned everything off and put it away.
Come back later at night and hit a "test" track I did not play first time around and almost passed out. Perfect little beginnings of a great song. It had bass, drums, guitar and a voice actually humming a melody, in fact a second voice chimes in half way through.
I am freaking clueless to the preset I used and what I tweaked. yes, i am a moron. Any way to walk back what the heck i did?