Strange twins

Last month I built a dual VCA module. If this looks familiar it’s because it’s not the first Kosmo format MFOS dual VCA I’ve made. I did the first about two years ago. But it wasn’t quite the same: That one was built around the commercially available MFOS circuit board, and was 75 mm wide, […]

Spring has sprung

Last year, around June maybe, I bought a spring reverb tank — which I then did not do anything with for months. Well, that was pretty much the plan. I bought it when I did because it was inexpensive and I didn’t expect to be able to get a similar deal later. At the time […]

Pole mixing filter

I’ve posted some things about pole mixing filters. Here, finally, is a post about an actual pole mixing filter. I don’t have the final front panel yet, but this module seems to be working: It’s a multimode VCF based on a (partial) design by Electric Druid. I made a number of modifications but the basic design is […]

Buffered multiples again

I’ve built two buffered multiples modules in the past: A Eurorack one by Horstronic and a Kosmo one by Cory Torpin, both of which are based on a design by Dave Jones. A design I considered for my first one, but decided against, was the Barton Eurobuffer. At the time I distrusted that design, because you (normally) […]

Kassutronics Wavefolder

Another new module, a Konversion of the Kassutronics Wavefolder. I included an extra jack and pot for a Symmetry (Odd/Even) CV and another extra jack for a second VCA CV, as described near the end of the Kassutronics build document. The PCB is built according to the Kassutronics instructions except the board mounted jacks and […]

DSO138 Kosmified

Do you need an oscilloscope to use a synthesizer? No, but it can be useful. Do you need an oscilloscope to build synth modules? No, but it can be very hard to troubleshoot without one. Do you need two oscilloscopes, one for using your synth and one for building modules? Of course not, not if […]

Turing to halting

The Turing Machine, designed by Tom Whitwell, is one of the most popular Music Thing modules. And like all the Music Thing modules it’s open source, so when Ben Rufenacht (of the LMNC Discourse group) decided he wanted a Kosmo format version, he copied the MT repo and laid out a Kosmo-size PCB and panel. […]

Clock video

Processing voltages

There are sexy, unusual modules that can be very interesting. Then there’s utility modules. Not so interesting, but useful. Here’s one: The design for this started out as a clone of the voltage processor from the ARP 2600 synthesizer. There are two voltage summing sections and a lag circuit. One thing that always bugged me […]

Clocking in

I thought about building a clock module for Kosmodrome Phase 1, then decided I didn’t really need one at the time because Phase 1 had no modules that would need a clock. But now I’ve built the G.E.A.R. Sequencer and YASH. Clock needed for Phase 2! At one time my attitude was that it was […]