Korg Minilogue and its descendants allow uploading of user oscillators, way cheaper at ~500. Plenty of YT tutorials out there. (edit) one of the first i found:

Korg Minilogue and its descendants allow uploading of user oscillators, way cheaper at ~500. Plenty of YT tutorials out there. (edit) one of the first i found: https://www.youtube.com/watch?v=ouGBnYXUT40 https://www.youtube.com/watch?v=ouGBnYXUT40