[kn0where]

You might be thinking of Logic or one of it's predecessors for Atari and Mac. I don't see any software that used the name GarageBand before Apple though.

> Logic stemmed from Creator, then Notator, made by C-Lab (the company's forerunner) for the Atari ST platform.

https://en.wikipedia.org/wiki/Emagic

[Intermernet]

Garageband definitely existed. I remember my music teacher showing me in about 1993/94. It was very simple, and we usually used cubase, but it was a thing. That's why I'm asking! It seems to have disappeared into the music software black hole and I have definite memories of it existing many years before Apple released their version of it. I'm talking well before osx came out! I do tend to think it was a mac program though, as we had Ataris and macs in the music lab and I usually used the Atari with a Roland sound canvas module (can't remember which one) and garageband wasn't something I remember using with any frequency.