Convert MP3 format to MIDI format on this site.
1. Take a harmonic audio sample.
2. Samplab’s AI takes the audio apart.
3. You can freely change all notes.
Get the VST/AU Plugin for free.
Inch By Inch is a free Max For Live generative step sequencer that creates gradually evolving patterns with probabilities for changing individual steps and other parameters.
A now free cross-platform MIDI sequencer surfaced as a VST/AU/etc. plugin. More info & download.