DROID - Universal CV Processor

DROID

The DROID is a very flexible generic CV processor for modular synthesizers in the Eurorack (Doepfer) format. It has 8 CV inputs and 8 CV outputs, all ranging from -10V to +10V. The DROID can do almost any CV task you can imagine, such as sequencing, melody generation, slew limiting, quantizing, switching, mixing, working on clocks and triggers, creating envelopes and LFO or other fancy voltages, or any combination of these at the same time. While doing this, is very precise both in voltage and in timing.

You tell your DROID what to do by means of a simple text file called “DROID patch”, while is located on a micro SD card. No special software is required for creating that file. A simple text editor running on Windows, Linux, Mac or any other device is all you need.

Controllers and expanders

By attaching up to 16 P2B8 controllers, each having two potentiometers and 8 push buttons, you can control any parameter you like while playing your music.

The G8 expander gives you 8 more jacks, which can be used for gate or trigger inputs and outputs.

The Circuits

The building blocks of a DROID patch are called circuits. Every type of circuit performs some specific task. A circuit is very much like a Eurorack module itself. Some of these do basic things like slew limiting, sample & hold or switching. Others are much more comlex, such as an advanced trigger sequencer with algorithmic extensions. Just like a Eurorack module, each ciruit has inputs and outputs. You can wire these either directly to one of the 16 jacks, or even connect them internally. Every parameter can be CV controlled. 

Here are a few examples of what your DROID can be for you. As long as you do not run out of inputs and outputs you can implement as many of these functions at the same time in one DROID. You also can connect them together internally.

  • LFO

  • Envelope generator

  • Melody and trigger sequencer

  • Random generator, bernoulli gate

  • Sample and hold

  • Precision adder

  • Slew limiter

  • Clock tool with divider, multiplier and delay

  • Logical and mathematical functions

  • CV looper

  • Euclidean rhythms generator

  • Versatile musical quantizer, octave switch

  • Addressable and clockable CV switch

  • CV mixing and routing matrix

  • VCO precision calibrator

  • ... and many many more...

You can use these circuits either directly - just like normal Eurorack modules - or combine them internally in order to implement more complex functions. Then you can assign pots and buttons of your "P2B8"-controllers for switching, tuning and live performing with these. Basically you can transform your Eurorack modular system into your own custom instrument. Or you simply use the DROID as a replacement for several utility modules, because it is very space efficient.