Have you seen the Zynthian UI control by ASCII keyboard interface. There are similar Callable UI actions through MIDI as well. These might manage simple patch selection during performances.
Here’s a blog following the construction of a MIDI Virtual Pipe Organ.
Another: The Pipe Organ in my Living Room :A Lifelong Journey
One more Pi based project, just for reference:
The Hauptwerk Virtual Pipe Organ Projects - OPUS II - A New Virtual Pipe Organ
I noticed a couple of audiophile sub woofers being given away in my town, in the Craigslist Freebies section, people downsizing, moving into apartments is one reason for giving them away. If you monitored these listings, perhaps you could collect an array of these self powered speakers…
The post: Accessibility for sight impaired users was started for lewisalexander2020 who is using The latest build of Aeolus under Organnery has just been released to run on Raspberry Pi 3.
One big organ kit maker showed a photos of a build with long pull out drawers on the left and right for computer keyboard and controls.
