Mido-based gear designed by Peter Blasser typically centers audio signals at a +4.5 volt bias, which Peter refers to as “mido”, i.e. middle. And these signals are roughly 4 volts … Read More

This patch uses two of the oscillators in the DIY Tetrazzi. These are each patched through a VCA channel of the new CL VCA and into my Eurorack effects case. … Read More

I noticed a problem with the DIY Quantussy right after I finished it. Chaos wouldn’t go all the way to zero. There was always a bit of cross modulation in … Read More

A few posts back I described an experimental VCA, based on the AVDog circuit by Peter Blasser in the Plumbutter. Our friend crucFx (Josh Rodriquez) offered to make a PC … Read More

A video and a recording

Tetrazzi, DIY Quantussy, 5-6 Rollz, Dubernator, and Cocoquantus all jamming together. Signal flow: Two Tetrazzi triangle outputs into two Dubernator channels; Dubernator outputs into Cocoquantus. Controls: 5-6 Rollz controlling two … Read More

Another Ciat-Lonbarde PC board from crucFX, a.k.a. Josh Rodriquez, with circuit design by Peter Blasser. Dubernator is a dual bandpass filter, highly resonant. It features two identical, independent filters, each … Read More

I’ve built a Tetrazzi quad oscillator, a Quantussy quintuple modulator, a Roolz 5-6 dual LFO, and am about to built a Dubernator dual VCF. All of these from PC boards … Read More

I’ll be playing at a local event, The Cesspool of Synths, on July 4th. The patch I’ll be using is pictured above, which uses my Ieaskul F. Mobenthey rack together … Read More

Peter Blasser put bounds modulation capability into many of his oscillators. But what is it? Consider an oscillator that bounces back and forth between an upper voltage and a lower … Read More