For now, it is enough for us to know that this is just not a concept, but a real working model.
We have included audio samples on this web site. People have been asking for video clips - they are now on the Media Page as promised - seeing is believing!
We have improved upon that first prototype with a second one using different materials for the "notes". This has resulted in a better instrument. It will be the second prototype that is shown in the video clips on the media page.