The Yamaha PSS series of keyboards offer endless circuit-bending possibilities, and the PSS 380 is my favourite out of all the ones I've opened up. In performance I play the keyboard face-down with the circuit-board exposed, using a bent strip of wire to make connections between points on the board. Played this way, the instrument produces an array of tones, noise bursts and loops, with the circuitry becoming more corrupted and unstable with each new connection.

More recently I have been experimenting with other ways of interfacing with the keyboard without building in extra controls or a patch-bay. One way which works nicely is to connect one point on the board to the end of a metal guitar string (in this case strung on a ukelele rather than a guitar), and have another floating wire connected to a second point. This second wire is then attached to a metal plectrum so that when the string is plucked, the connection is made on the circuit-board and material is generated from the keyboard as well as sound being produced acoustically from the ukelele.

PSS 380 mp3 clip

PSS 380 and ukulele mp3 clip