Goodguy,

.MGU is the standard extension for BIAB is the song contains a melody (that's what the M stands for) so the song should open fine.

When you renamed the song, what happened was that a second copy was created. The .MG9 (which I guess is a custom extension because I've never seen it before) is one song. Then with the save when it became MGU, a second instance of the song was created. I always save multiple instances of songs so that I can get back to earlier versions if ever I want to. The song files are so small that the space they occupy is negligible.

Regards,
Noel


MY SONGS...
Audiophile BIAB 2024