Remix

[Dj Xakis]

What is the process to remix

[musikbear]

What is the process to remix

Explained here
https://en.wikipedia.org/wiki/Remix

Besides that, since you are new in Forum
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[trancwolve]

Basically you take the tracks of the original song (be it audio or midi) and start modifying them until you think it's different enough.
Or if you don't have access to such, you just recreate the melodies by ear.