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!

Korg MS-20 Teardown: Pulse Width Modulation Install

The vintage Korg MS-20 monophonic synthesizer comes with a pulse width knob, but no way to patch a modulation to it. In this video I teardown the MS-20, and install a Pulse Width Modulation routing.

My PWM will come from the MG/T.Ext circuit that is already present on the synth. 90% of the time I want to use the MG, AKA the LFO, to modulate the Pulse Width. So all I will do is add a small pot and current limiting resistor for routing the MG/Total circuit to the Pulse Width.

What about the other 10% of the time I don't want MG going to PWM? Well the MG is only normalled to the Total/External jack. If something is patched into the Total jack, it will override the MG and be routed to the new PWM pot. It behaves exactly the same way as the MG/Total pots for Pitch/HPF/LPF. Pretty sweet.

At the end of the video I patch various things to modulate the Pulse Width. Stay safe, don't electrocute yourself, and be sure to unplug the synth at all times while doing work inside the unit.

Basimilus x Disting x Juno-1 x Synth Box x JV-2080

In this video the Eurorack is patched for a noir future tech workout. Think Blade Runner meets Air Liquide meets Blue Room Project. Basimilus and Disting team up for filthy glitch beat detail under command of the Varigate 4. Then darkened up by the JP-6 VCF. Disting is loaded w/ TR-606 sounds, but mangled by pitch modulation. Bastl Little Nerd is spitting out gates in all directions. Pittsburgh Modular Synthbox simmers a nice PWM bass pad. Ere there be JV-2080 Mellotron Choir getting the chop-chop from Bastl Skis. Soaring leads and swells are the Juno-1, my Aurora Pad 1 patch. Timefactor Delay on the Juno-1. Mixed on a Mackie 802-VLZ3, recorded direct to Tascam DR-05.