Sunday, April 15, 2018

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.

Tuesday, April 10, 2018

My DC571 Dual Compressor for Eurorack is Now Available

My DC571 Dual Compressor for Eurorack is now available in my Reverb Store. To operate the DC571: 1) plug in the audio input and output, making sure some sounds are present 2) set the switch up (compress) to activate the effect 3) turn the input knob until you hear clicks/pops (clipping) and then back it down a little 4) set the switch down (bypass) to compare the volume of the original signal 5) set the switch back up and turn the output make-up gain knob until the volume is the same as when you started. You may need to repeat steps 4 & 5, and it’s definitely ok to increase the output a little bit more if so desired!

Sunday, April 8, 2018

RM&S Ring Mod + Sub-Octave Generator now available

My Ring Modulation + Sub-Octave Generator module is now available at Reverb dot com!

RM&S is a 4HP Ring Modulator and Sub-Octave generator. The Ring Modulator is an active, CMOS-based circuit adapted from the ARP Odyssey. Ring Mod is usually generated from inserting square wave VCOs to Input 1 & 2. But that shouldn't stop you from sending sawtooth, wavetables and noise sources through this.

The Sub-Octave Generator circuit is derived from the Roland SH-101 and provides -1 and -2 octaves from a square wave plugged into Input 1. Many VCOs put out varying degrees of signal amplitude, a trim pot is provided to adjust input impedance of VCOs for the Sub-Octave Generator circuit.

Output jacks include: Ring Mod, summed Ring Mod + Sub-1, Sub-1, and Sub-2. The RM&S is hand-crafted in the USA.

Measured Current Draw: 2mA on -12V, 5mA on +12V, 5V not used

Monday, April 2, 2018

Three Machines = MS-20 + Juno-1 + Eurorack Synthesizers


Feelin' a good 100-bpm chill vibe today. Three Machines are: Korg MS-20, Roland Alpha Juno-1, and the Eurorack system. Future Retro Transient+ is swinging a nice CR-78 groove thanks to mapping some CVs from the Beatstep Pro, running through the Delta VCF to take the edge off the highs. The CEM3340 VCO doing the arpeggio thing using quantization from Ornament & Crime, running through the Tonus VCF. Euclidian triggers from Temps Utile. Bass from the Synthesizer Box. Playing a delightfully mindless riff on the MS-20. Some Timefactor Delay, some Big Sky Reverb. Recorded in one shot, some post-work done in Cubase.

Friday, March 30, 2018

Future Retro Transient+ Eurorack Demo 01


I just got my Transient module back from Future Retro, they have upgraded it to the Transient Plus! The turnaround on this was super-fast! I made a Linndrum-based instrument w/ kick/stick/hihat w/ some modulations including pitch changes. This demo also uses Basimilus and Hats909 as well. Enjoy.

Thursday, March 29, 2018

RM&S Ring Mod & Sub-Octave Generator Eurorack


Square waves and Pulse Width Modulation are among my favorite synth things. However, CMOS Ring Mod to me is like PWM on steroids. Today I am demonstrating my prototype module RM&S. It takes two square wave inputs and derives CMOS Ring Modulation based on the ARP Odyssey. Square wave Input 1 is used to generate -1 and -2 octave Sub-Oscillators. But this module has another trick up its sleeve. An additional output is provided which sums both Sub-1 and the Ring Modulation for a super-fat synth tone!

Monday, March 26, 2018

DC571 Dual Channel Audio Compressor Eurorack Prototype


Headphones or quality audio monitors recommended. In this video I demonstrate a prototype of my new DC571 Analog Dual Channel Eurorack Audio Compressor. It will make your bass lines a little punchier, and your percussion grooves a bit more groovy. The way to operate it is simple - the stronger the input signal, the more it compresses. Use the output make-up gain knob to bring the level back up. Both channels are completely independent of one another - so use it for stereo purposes or for two different instruments if you desire. These will be hand-crafted in limited quantities for sale soon, it will have a black front panel w/ white silkscreen lettering. More details on price and availability to be announced later.

Sunday, March 25, 2018

Testing A Ring Mod + Sub-Oscillator Circuit



In these quick videos I am testing a DIY Ring Mod + Sub Oscillator circuit through my Tonus VCF (ARP 2600 clone of the 4012 filter). The first video is through a Timefactor Delay. The second video I am punching into freeze mode on the Strymon Big Sky for a colossal wall of sound! The Ring Mod + Sub will become a eurorack module, I will give more info on that soon. Sequenced on Arturia Beatstep Pro. Thanks for watching!

Friday, March 9, 2018

Analog Audio Compressor - 1 Minute Demo w/ Eurorack


Today I am testing out an analog audio compressor circuit on the breadboard with a nice percussion groove from Basimilus Iteritas Alter. This analog compressor will eventually become my next Eurorack module. More to be announced when design is finished.
Today's signal path is dead simple:
Basimilus / Delta VCF / Big Sky (Hall Reverb) / Compressor / Out
Clock and Trigger:
Beatstep Pro / Varigate 4 / Basimilus

Thursday, February 22, 2018

Artwork ft Oberheim Matrix-12 + Eurorack Synthesizers


Oberheim Matrix-12 synthesizer + Eurorack = match made in heaven. Glitch beats + melodic pads/strings. Everything performed live, recorded on-the-fly. Reverb on Matrix-12: Strymon Big Sky. Delay: Eventide Timefactor. Some post-processing including compression + eq.

Euro modules: CEM3340 VCO going through my Jupiter-6 VCF module - bass, Noise Engineering Basimilus Iteritas Alter - Kick/Snare, Pittsburgh Modular DNA Symbiotic Waves going through my Tonus VCF - other percussion, Tiptop Hats909 - closed hat, G-Storm Infusor - percussion sub-mixer, Mutable Instruments Clouds - percussion granular mangling, Malekko Varigate4 - percussion triggers.