I have been playing with a new music sequencer that was written while the developers [100 Rabbits] (https://github.com/hundredrabbits/Orca) traveled over the Pacific Ocean.
It is part of a suite of open source software they wrote that is so simple and elegant it inspires one to spend hours creating combinations and iterations off the basic rules.
One of the rules is that there is a function to every key on the keyboard. A through Z.
The sequencer produces no sound of itself, but requires a midi sound generator. I used fruity loops to get things going on my recording.
If you want to see more examples, follow this youtuber's channel: https://www.youtube.com/channel/UCeo2Fo1OidWpT83BT5xmCZw
► Listen on DSound
► Listen from source (IPFS)