Thanks for sharing Henry!
Several people asked for this kind of Layout and it's finally here ;-)
I keep changing (sometimes known as "improving" ) the webapp software for this. The chord button layout could stand some improvement - in fact it's being updated now, so if you are playing with it, try getting the ".emk" files tomorrow!
I am adding more chord layouts and schemes, like "Brian Bowers layout", Prizm Zither, and actual, authentic chord voicings that match the string schedule of standard autoharps (which have fewer bass notes). I can also add lots more chord buttons and support "Omnichord" style two-button chord choices, which is a why to get colorful chords with fewer buttons. .
Henry Lowengard
Oh, I'm a busy little bee.
One of the other reasons I wanted to get a large configureable surface was to have a close to real sized virtual autoharp set up. I have a history of this: I wrote such a thing for the Commodore Amiga called LYR back in the 80s (here's a link to an EMI article I wrote in1994 with many of my software instruments). I improved on LYR decades later with my iPad app Polyharp (PolyHarp.com). And so, here are some videos showing how I put together a simulation using a webapp running in Chrome.
Oh, you want to try it your self? As always, it's under active development, no guarantees, but here is the webapp:
https://arty.fish/MIDI/autoharp.html
and the template is attached.
Just plug in the Erae, find a nice MIDI synth to drive with it , and connect the ports using the webapp.