How I Did It
Tools I Used
SuperCollider
Pianoteq
Reaper
Ubuntu Studio
Patchage
Process
it started as an improvisation.
I've started writing some line of code to play some pseudo-random piano notes.
Then I placed I simple two AM sine waves as the bass.
Then I played the harmony on top of them.
I've also done some minimal editing in Reaper (fades).
Other Notes
While playing it was really fun to add some pith shifting to the piano sound with the pitch-bend wheel of my MIDI keyboard :)