There we go

Analog Output has moved to: https://richholmes.xyz/analogoutput.

Imagine me finding myself a new blogging platform

As of today, anything on wordpress.com can be assumed to be false, AI-generated garbage. I’ll let you know when I figure out where to move this blog to.

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 […]

SDIY Prints

I’ve mentioned my 3D printed fixtures for the DSO138 and the Kassutronics Wavefolder, but I’ve also printed a few other things for my synth work. Wire spool holder There are a bazillion wire spool holder models online, this is another one. I just didn’t feel enthusiastic about any of the ones I found so I […]

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) […]

All the docs

It’s 2022. You design a synth module in KiCad 6, and you want to document it. So: It’s 2023. February. You design a synth module in KiCad 7, and you want to document it. But now there’s the kicad-cli command. You can use it to export the schematic PDF. You can use it again to […]

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 […]