I have not seen one of thes instruments. I myself had a floor bass pedal built by Carl Sempreveo in florida which had 12 pedals and simulated the two top strings of a bass guitar. It was played by sliding the left foot along a rail allowing the player to play root notes with the toe and alternate fifths directly behind with the heel as well as simple bass runs. I sat on a bar stool and after getting used to this pedal found it very good. I still have the pedal but no longer use it. would like to get rid of it. However, with all the new self playing accompiments out there no one seems to be interested.