Introducing My 2xVCA 6HP Eurorack Dual VCA Module

Today I demonstrate my 2xVCA Eurorack module, an analog dual voltage controlled amplifier. Channel 1 is processing modulated noise coming from the E352. Channel 2 is handling an arpeggio from the CEM3340 VCO. My 2xADSR dual envelope is sending CVs to the VCA. I've added a kick from Future Retro Transient, and bass from DNA/101-VCF.

Recorded direct to a Tascam DR-05, some Timefactor delay used.

Specs and details are available at Modular Grid.
Be sure to check out the 2xVCA and my other cool modules available in my Reverb store.

Spring Tank Reverb Breadboard Eurorack Demo

Try not to let your heads explode when this sickness fondles your eardrums. Got my hands on an O.C. Electronics Spring Tank Reverb. On the breadboard I've built a driver circuit with voltage control of the wet/dry crossfader. Who does that???!!....

I do that. And today's demo shows you why. The Future Retro Transient+ is going through the spring tank. The mix is set mostly dry, but I'm using a short envelope to send a burst of reverb wet mix when the snare hits. Using the Beatstep Pro for that. That's what I'm talking about. That. Is what it's all about.

How did I do this? I've frankenstein'd a couple of circuits/ideas together to make this happen. At its core is a Tombolas DIY Spring Reverb Circuit w/ EQ and Drive Control to accommodate a wide variety of tanks. It worked very well, but I was not yet satisfied. For the Voltage Control, I've slapped away the final amp mix stage and replaced it w/ the VC Crossfader circuit by Thomas Henry. I dumped his VCA control, that's another project for another day, and to made some minor changes so it would play nice w/ the Tombolas circuit.