This module – a recreation of the classic Serge Wave Multipliers (VCM) module from the early 80s, adapted partially to the Eurorack format – contains a nicely-rounded, tube-like clipping or saturation; a wave folder that emphasized the odd-numbered harmonics; and a three-stage full wave rectifier that emphasizes the even harmonics. The video in this article focuses on the wave shaping section, and compares its analog sound to the digital one included in the Expert Sleepers Disting; I also discuss matching Eurorack levels to work with Serge-inspired modules.
A nice option for an analog VCO to add to your system is the Intellijel Dixie II+: it’s small, has excellent tracking, supports linear and exponential FM as well as PWM and hard sync, and has six different waveforms. In this movie, I demonstrate creating a hard sync patch with the Dixie II+. For those who wonder exactly what’s going on when you use sync, I focus heavily on what’s happening with the waveform output. I also look at the Dixie II+’s unique Flip function.
There are a lot of voltage-controlled stereo mixers; perhaps lost in the shuffle is the Verbos Scan & Pan. It features four input channels with both voltage and manual control of level and panning per channel, as well as manual control of a huge amount of input gain. In this video, I demonstrate using the Scan portion of this mixer to combine the different waveforms available from an Intellijel Dixie II+, including its sub-octave output plus its sine wave that is saturated by the Verbos. I particularly have fun using an envelope to articulate that mix per note.
The next big “Learning Modular Synthesis” project is Eurorack Expansion. The idea behind it is that you already have a semi-modular synth or a small modular system, and now you’re wondering what to add next. As the saying goes, you need to walk before you can run. I’ve built up a core set of deceptively boring yet essential modules that will make it easier to interface your core system with the fun new modules you’re dying to try out.