Just proof of concept, inspired by Olafur Arnalds.
VCV Rack basically captures midi notes that I am playing in live and turning it into a generative melody. The generative melody consists of octaves / fifths of the original note with notes and rhythm based on a biased coin flip. The duration and velocity of the generative melody is based on the the original note.
Few things that need to work on:
More dynamics i.e. legato marcato.
A way to trigger the ghost piano instead of rely on a delayed gate.
Attention: Need external synths / MIDI VST to work.
Example (Works especially well after 2:20 ish):