Two sets of short recordings with the setup above. The first set uses the DIY Quantussy oscillators, which are triangle waves. The second set uses the DIY Tetrazzi variable shape … 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

Peter Blasser, creator of the instruments pictured, describes the nabra: Analog Brain means any kind of analog synthesizer or computer set up with crazy feedback and self-stimulation that it pulses … Read More

My banana cabinet is finished! It combines 5U modules, a rack of BugBrand, and my custom CGS Serge panel into one cabinet. Note the vertical alignment between the CGS Serge … Read More