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Imported from GitHub: Len42/Synth · commit df2c9bc

Description

Eurorack synthesizer module designs

README

Attenuator

Eurorack attenuator dongle

Features

  • Passive attenuator, approximately -20 dB
  • A small dongle that can be patched between modules or devices
  • Bidirectional - plug it in either way around!

Notes

I made two of these small attenuator dongles for my Eurorack system because I kept running into situations where I want to knock down the signal level by a large amount. I have a fancy attenuverter module but I just wanted something small and simple that would leave the attenuverter free for more important jobs.

My particular reasons for using this attenuator are:

  • Using a tuner (or other external device) - I have a tuner that has trouble with the signal level straight out of a Eurorack VCO, so I keep one of these attenuators plugged into the tuner.
  • Bad design choices - I made the pitch mod inputs on my oscillator modules way too sensitive. Even though there's an attenuator control on the input, it's hard to get a reasonable vibrato when I patch in an LFO. Sending the LFO through this attenuator gives a much better range of adjustment on the pitch mod input, for most purposes.

The device is assembled on a small piece of stripboard PCB. See the attached layout diagram.

Please note that I am a hobbyist, not a trained electronics engineer. No guarantees!

Software Used