Ultratroninator 3000

Ultratroninator 3000. Yes, that is a silly name.

Catching Up…

3372 Designs and Board Rev 0.2

I made some modifications to the v0.1 Zoxnoxious 3372 design to fix a few things. List follows. Pretty cool to see all this stuff working. Except the last point. The resonance took a hit somewhere. Here’s the v0.1 circuit, using the AS3372E chip: Note pin 23 (VCF_Out) and pin 17 (Res_In), the feedback path for…

March 12, 2023March 15, 2023

[Video] Zoxnoxious versus Voltron Demo

Here’s a teaser demo of each Zoxnoxious card and putting the cards together to create a working analog synthesizer. Since attaching things together is pretty boring, I gave it a Voltron spin. Yes, an 80s cartoon of robot fighters that were next to useless individually until they combined to form Voltron (why didn’t they just…

February 27, 2023February 27, 2023

Fun with the AS3372 Signal Processor

Thought I might summarize my experience so far with Alfa Rpar’s AS3372 chip. First off, is it a VCF? It filters signals. Is it a VCA? It’s got six VCAs onboard. The CEM3372, which the AS3372 is based on, is called a signal processor, or more correctly “µP Controllable Signal Processor”. Which, well, it does.…

February 17, 2023February 17, 2023

Recent Videos: Filter and Sync

Some videos from the past months that I haven’t added to the blog til now. First is the AS3372 filter demo. Nothing like playing something from a breadboard using trimpots to tweak. Halfway through the video the amplitude modulation is enabled on the filter output. A more complete demo will be done once an actual…

January 18, 2023

Filtering On The Way

Spent the holidays working on a board surrounding the AS3372 voltage controlled filter. The AS3372 is a clone of the Curtis Electromusic 3372, a chip notable for the filter in the Sequential Prophet 600 and Oberheim Xpander, amongst others. It’s got a really nice CEM filter sound, and the Alfa Rpar version added a couple…

January 17, 2023January 17, 2023

Progress Report

Lots of action in different directions. Where to begin? Rev 0.5 for 3340 board Revision 0.5 of the Zoxnoxious 3340 board is back from production. The changes were towards the small side, meaning the board is pretty near complete. List of changes: A demo will be in order if I can get four or five…

December 7, 2022December 9, 2022

Block Diagram and Front End Updates

I updated the block diagram on the overall concept for the Zoxnoxious analog synthesizer. Current effort is towards the driver side on the Raspberry Pi and it’s coming along well. Working towards having the card-specific Pi stuff being a fairly small plugin that implements just a few functions. And abstracts out the Alsa side of…

November 1, 2022November 1, 2022

Module Facelift

It’s about time for a module facelift on the Zoxnoxious 3340 module and the Audio Out. So I’m replacing the rather dull and uninspiring look with… something slightly less dull yet still uninspiring. But better. I’m awful at UI, which is bad ’cause this is pretty much the end users entire experience with these modules.…

October 19, 2022November 17, 2022

[Video] Playing with VCV Rack’s Expander

Looking to get a way such that all the cards in the system can send the right data down the pipe to the Raspberry Pi controller. One VCV Rack module is the primary that holds both a MIDI and Audio interface. The other Rack modules need to receive & send data down the Audio/MIDI pipe,…

September 26, 2022October 1, 2022

Patching Cards With VCV Rack

Thinking about something like the EMS Synthi interface for patching signals between cards. Since VCV Rack deals only with virtual signals, routing the actual analog signals between cards something. I thought about having each card have a selector to choose what input(s) it taps signals from. Implementation-wise that might be the easier way to go.…

August 22, 2022August 22, 2022

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