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

Left to right: Swoop Spokes, DIY Quantussy, Large Tetrazzi PCB, Roolz 5-6, Meng Qi Rollz-5. The Patch The five outputs of Swoop Spokes patch over to the five Quantussy petals … Read More

Features Four oscillators with independent controls and outputs Saw, Triangle, Ramp variable shape output Pulse output with variable width Rise rate pot and CV input Fall rate pot and CV … Read More

I noticed a discrepancy of resistor values on the Large Tetrazzi silkscreen and graphic at the spots where the Upton/Donton and Upmod/Dnmod controls attach. All of these come through a … Read More

I built up a part of the Tetrazzi circuit for test purposes. Only the core VCO part were installed, around the 4051 switch and the TL082 op amp, plus the … Read More

This PC board appeared in my mailbox, a gift from Josh Rodriquez. It’s hard to believe that it has been nine years since my Modular Tetrazzi project to put Peter … Read More