Rollz-5 is Peter Blasser's circuit design, it is the ancestor of Plumbutter. It is can be understood as a Drum Machine, but not quite.
Instead of sequencer on most drum machines, Rollz-5 implies geometric rolls that outputs pulses in different paces, set by component values while building. Even rolls would produce rhythmical signals while odd rolls would yield high frequency oscillations. The rolls can be connected together to form complex rhythms and audible signals.
Then the signals from rolls will be connected to 3 different sound modules, following descriptions are taken from Peter's website :
GONGS : It works with even pulse material, waiting a period set by the control knob, then pulsing a resonant filter preset to a certain pitch and damping. Normally I would desire moveable pitches, but I reconciled with set pitches because this is a drum machine- The tones mark phrases around which melodies develop externally, and I would rather control the phrase length than the tone of the gong. Anyhow, a creative hacker could easily mod these circuits to make the pitches moveable. The sonic effect is anything from a short woodblock tone to a long deep resonant gong, synchronized at short or long periods.
Currently Rollz-5 is available as partial kit and PCB from shop.