Crackle-canvas is some great performance work by Tom Verbruggen which has manifested itself in a number of different versions. The work is essentially a series of built / circuitbent devices which when patched or networked together produce sounds that can be manipulated in live performance. For examples of this see the videos below (in the last video Tom talks about his work before performing) or Tom’s YouTube profile.
Above: Crackle-canvas/ Primary
Above: Tom Verbruggen performance in Bristol
For similar work see Douglas Irving Repetto’s Crash and Bloom.