Ultratroninator 3000 Zoxnoxious Analog Synthesizer

video upload by Ultratroninator 3000

"Demo of the 'beyond obnoxious' Zoxnoxious analog synthesizer with 6 voice cards installed. The installed cards:
* Dual VCO synth voice
* VCO x4
* Analog signal processor (VCF/VCA)

After some software updates I'm able to install up to 6 voice cards. Taking advantage of it here. This is more a proof of concept demo than anything else: certainly someone with some musical talent could do something much better than this.

Video shows each card being added to the Audio Out backplane, system turning on (look! LEDs!), then a close-up of each module in VCV Rack.

In development / coming soon:
* Z5524 dual VCO synth voice (SSI2130 VCO + AS3394 synth-on-a-chip) demo
* CPU auto-tune functionality"

Demo: AS3394 Waveselect Modulation


"AS3394: synth-on-a-chip. This is Alfa Rpar's clone of the CEM3394, the same chip used in the Sequential Six Trak and other 80s synths. What's new here? The '3394 has a input pin to select the VCO waveform. How about modulating that input at audio rate? Switch between tri, saw, tri+saw? Here is a demo of audio rate modulation.

Video shows some ways that could be used for modulation. Either by varying the modulation amount (LFO, envelope), or by varying the modulator (sync, pitch) a variety of effects are possible.

The completed board will use an SSI2130 as a second VCO as a modulator. This demo is bit of a hack in using an external VCO for the same purpose.

Interesting effect? Usable? Noise? Drop a comment on your thoughts!"

AS3394 - Audio Rate Waveselect Modulation


"Demo of the working part of this synth voice card: the AS3394 synth-on-a-chip. Beginning of the video I jumper a '3340 VCO to where the eventual SSI2130 will be on the board. This VCO is used for modulation of the AS3394, in this demo the waveselect modulation.

The "Half-Working" is a bit of a self-jab. The card is missing an SSI2130 which needs to be soldered on. The card as used is functional, less a second on-board VCO."

Ultratroninator 3000
"Developing projects around Raspberry Pi, synthesizers, retro devices. Demo videos of the Zoxnoxious analog synthesizer."