All done with Animation Nodes and a few base meshes, with Instances:
I am now waiting for a MIDI Node that would read a MIDI file, create a series of controls with F-Curves derived from the MIDI notes and tracks so I can play instruments. I can do this with the old Blender 2.49 script, but this would be a great addition to AN.
Here’s a picture of two keyboards playing chords and melody using this method:
I may render this, it’s the first guitar solo from Comfortably Numb - I played this on my TMK88 connected through an iRig into my iMac and input into Reason DAW.