Oscillator – evidenti.com

Reverse Avalanche Synth

Reverse Avalanche Synth This is a drone synth based on three Reverse Avalanche oscillators and half Ugly Face pedal that were buried in a box under other failed circuits. It uses S9018 transistors so it can run on 9v (which somehow limits its range) and has a raw, primitive sound. Paired with Escobedo’s galactic fuzz… Read More

Lo-fi Terror Noise Synth

Lo-fi Terror Noise Synth This noise machine is a collage of ideas all put together in a rush: a 40106 polyphonic oscillator section with starve control that goes through a galactic fuzz and a dirrrty delay section. It is not the cleanest build around, but it is nasty, edgy and capable of otherworldly alien sounds. Read More

CMOS Theremin

CMOS Theremin This theremin is based on this layout from Paul in the Lab. It runs on two 4069 chips and the antenna only controls the frequency. As the signal can be a bit low, I added an extra Ruby Amp circuit to boost it. Although it is not a perfect device range-wise and it is not an… Read More

ISD1820 Filteroid

ISD1820 Filteroid Mainly used as a sampler/looper, the ISD1820 chip is used here in feedthrough mode. This turns this circuit from Synthlurk into an audio processor that can be used as a filter, amplifier, fuzz, suboscillator, noise generator or distortion unit. Check this thread on LMNC Discourse group to learn more about it. Read More

Heterodyne Peyote Space Explorer

Heterodyne Peyote Space Explorer The Peyote version from this Beavis Audio Research lo-fi synth has three independent square oscillators, a complex wave form generator, a white noise circuit and a mixer . This build has some changes from the original schematic though: I found out that the white noise circuit was mostly silent, so I changed it… Read More

Subbass Synth

Subbass Synth Drone synth built during Mutan Monkey Instruments Subbass Spectrum workshop, focused on the experimentation of certain acoustic phenomena in relation to the lower frequencies of the sound spectrum. This is an analog sound generator composed of 3 low frequency oscillators (from 38 to 160 Hz), each with a frequency and volume control, with which we… Read More

Quantum Defrakulator

Quantum Defrakulator This is the first version of this great sounding synth by Parasit Studio. It has three independent square wave oscillators with a common filter and an lfo switch that turns oscillator 1 into a 4-step sequencer. Not an easy synth to make, but a very rewarding one once it's done. You'll find all… Read More

4ms Noise Swash

4ms Noise Swash A chaotic random noise maker, self-oscillating fuzz/distortion with power sag, clipping diodes, feedback and overall unpredictable whackiness. Not many components but lots of pots to solder, have a look at the veroboard layout here. Read More

Peyote Drum Explorer

Peyote Drum Explorer A noise/rythm variation on the Heterodyne Peyote Space Explorer circuit, you can find all the info to build it here. Read More

Heterodyne Space Explorer

Heterodyne Space Explorer A classic Beavis Audio Research CMOS synth, this flexible tone generator is comprised of four 40106 square wave oscillators. The supply voltage can be sagged to create starved sounds as each oscillator competes for voltage. Each output stage goes to a switch that flips between a resistor mixer and a diode mixer. Each… Read More