A little update with a few sound examples.
I finally finished recreating my lost synth, and as you can see: Large components, analog stuff all over, and as some would maybe say “completely outdated”. The little compact synth has also grown to be much more complicated, and also rather difficult to operate (even for me). I told in an earlier post that I simply had to recreate this “thing” as part of a mental proces to regain my creativity after we lost everything (including my little workshop) in one of the biggest fires in Copenhagen in many years. It has been a lot of fun to do, and it actually works fine. Here is a little example of the strange sounds it can produce without any patching, with only one CV/GATE-pair input from a Behringer 960 sequencer:
Since this is the first and maybe only version that I will build, I have “stuffed” some extra features and 4 more frontpanels into the design. The main purpose is to use it as a workbench for testing new module ideas, and this is why many of the internal signals are also brought to the front-panel:
Sorry for the very big and bright LEDs 🙂
All the modules are permanently installed in a single 19″ Eurorack, powered by a Doepfer tripple analog power supply. The bus is a long one, also from Doepfer, but divided into two sections that can be turned on separately from the front panel. In addition the bus CV and GATE can also be separated and connected from the front. The bus that can be separated is for testing new additional modules.
Everything is mounted on a shielding 4 mm aluminium plate that slides into the cabinet on top of the (noisy?) power supplies in the bottom. In the bottom I also have a fan, a fan-speed control and a small class-D stereo amp. An extra 12VDC supply was necessary for the amp, the fans and future “Arduino-things”. These are too power-hungry and noisy to put on the synth power bus.
Finally there are two Joy-It variable V/A regulators (switchmode) with two MeanWell fixed-24VDC supplies as power inputs. This setup is coupled as a split +/- 0-24V 0-4A “lab-supply”. Of cause it is not as good as a low noise, analog supply, but it is much less heavy and it serves the purpose for testing less critical stuff.
Here below you can see the whole setup with the Eurorack pulled out:
All the space to the left in the rack is for future modules and some Arduino- and RasPi4-things.
Here you can find more details and a list of most of the features:
Analog Eurorack Sound Synthesizer
More sound examples: