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RYO Optodist Quick Start Manual

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LjunggrenAudio RYO Optodist:
an OptoVCA with distortion and LED limiting.
Quickstart – what is the Optodist and how do I get going?
The Optodist is a compact, easy to use, easy to build and great sounding
distortion module which will also work as a VCA if desired. Consisting of a
voltage controlled amplifier based on a pair of Silonex/Advanced Photonix
optocouplers that allow a characterful overdriven sound and plucky dynamic
response to CV, it is as equally at home "crisping up" highs and mids or warming
up your lows as it is at turning a resonant filter into a howling beast or your
drums into crushing carnage.

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Summary of Contents for RYO Optodist

  • Page 1 Quickstart – what is the Optodist and how do I get going? The Optodist is a compact, easy to use, easy to build and great sounding distortion module which will also work as a VCA if desired. Consisting of a...
  • Page 3 nstallation o begin installation, please make sure that: you have a standard pinout eurorack bus board - you have +12V and -12V power rails on that bus board [no +5V supply is required] - the power rails are not overloaded !!!Before installing this module disconnect the power from your system!!! - Double check the polarity of the ribbon cable - The red stripe should be aligned with the -12V rail, on both the module and on the bus board...
  • Page 4 VCA where gain dictates the VCA initial level; opening the 'gain' knob past approximately 50% will introduce distortion - from 50% up to max gain (full cw) the Optodist will boost the signal with increasing distortion).
  • Page 5 Dimensions Height: 3U [128.5mm], Width: 6HP [30mm], Depth: 31mm (with power cable attached) Weight: 30g (approx w/cable) Current consumption +12V rail min 13mA to max 16mA -12V rail min 13mA to max 16mA +5V rail no +5V supply required [There are small power variations between different vactrol and LED varieties. The option requiring least power is SR3 optocoupler paired with green limiter LEDs.] Basic specifications...
  • Page 6 – RYO modules are designed with all necessary protection and fail-safes so you can...