Midi - Digital Creativity

AI to Midi

Upload an audio track, get midi back. You might have to split audio in basic tracks into instruments with a different tool (maybe https://www.lalal.ai/ or https://www.audioshake.ai/)

Basicpitch

Audio
Midi

A tool that turns any audio file into midi.

Mindful Harmony

Midi
Music

A tool to compose or arrange unusual chords - and you can then save it in midi (maybe importing it into Garageband or BespokeSynth).

SoundTrap

Audio
Midi

Full audio midi workstation

Bear Audio Tool

Audio
Midi

Convert mp3 file to midi

MidiMaker

Midi

AI that generates a Orchestral/Ambient/Rock song in midi format (that you can export and import into Garageband for example). Can do loads for free but good to try.

MuseNet

Musenet takes an "intro" and then "evolves" it with AI in different styles such as Beatles, Mozart or Bluegrass. Interestingly you can upload your own custom midi track and let it evolve that too.

I tried adding a file created by Computoser as a starting point, and I think it made it more Beatles-y but it's hard to tell. Doesn't have a download option.