How Sound Selection works in the Yamaha CS-80

Yamaha CS-80 angled closeup of front

One of the things that has been the most helpful for me over the years in sort of syncing up my general understanding of electronics theory with understanding how synthesizers are actually designed is reading circuit descriptions in service manuals. A lot of the American companies especially wrote really great, detailed explanations of how their instruments worked, and reading them has helped me to both understand the specific circuits they discussed, and understand more broadly how different objectives in synth design can be achieved… and more quickly recognize what’s going on in an unfamiliar circuit.

Because I’m a nerd I guess, I thought it might be fun to make some step-by-step “circuit descriptions” like that for synth circuits that don’t have them.   My first featured circuit –the system through which the Yamaha CS-80 handles preset, panel and memory switching– is sprawling, but actually fairly simple, much like the synth that it comes from. Continue reading “How Sound Selection works in the Yamaha CS-80”

Double Sequential Circuits Prophet 10 Restoration

While we’re working from home due to the virus and have all of the synths and all our recording gear in the same place, we took the opportunity to make this video about the restoration of two Prophet 10s we’ve restored recently. One of them proved to be one of the most arduous restorations we’ve ever done due to massive damage to its microprocessor system. It was a long road to get it working, but when it was done, we celebrated by MIDI chaining the two of them (which we had also both retrofitted with MIDI) and making some fantastic and massive PROPHET 20 sounds! Check out this video for a recap of the restoration process and some demos of the synths’ powerful sound.

Roland Jupiter 6 – calibration tips

Roland Jupiter 6
Roland Jupiter 6

The Jupiter 6 is one of Roland’s two most beloved 80’s polysynths, the other being the Jupiter 8. While I was looking for service documents for the Jupiter 6 though, I came across some absurdly aggressive forum posts from people who don’t like this synth and are pointlessly mad that a lot of other people like it a lot. Continue reading “Roland Jupiter 6 – calibration tips”