First Demo Video Published on Project Page
The first video is a sample of 2 of the 16 audio modes, and some other features of the design. Though this is working from a "breadboard" circuit, the final design is nearly complete. It will live on a 2.5" pcb (printed circuit board) mounted directly on the instrument, or in a custom case as the builder sees fit.
The circuit is Arduino based, and can be updated via the usb cable as new open-source firmware is released. Different size sensor pads can be substituted with no change to the firmware or PCB. As an alternative, a pressure strip can replace the round pressure pad, making the ribbon pressure sensitive along its length.
Here's a link to the same video on youtube for folks to link: