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Φορέω is a triple function processor for triggers, gates and clocks. It simultaneously performs pulse width modulation, multiplication and repetition, with individual input, output and CV for each function.
  • Pulse width modulation, as a ratio of the input signal rate, is adjustable from 0 to 100 percent.
  • Multiplication also operates on the input signal rate, multiplying it by a factor from 1 to 16.
  • Repetition generates a burst of triggers, at the rate of the multiplier, with repetitions adjustable from 1 to 16.
Each function has two knobs for manual and CV level, and three jacks for trigger input, CV input and trigger output. Pulse width modulation carries through to the outputs of the two other functions, and the three trigger inputs are normalled from top to bottom. When multiply and repeat are combined, Φορέω makes an excellent burst generator, perfect for rolls, flams and fills. The repeater gives precise control over burst length, while the multiplier easily moves from quarter notes, to thirds, to eights, to everything in between and lots more beyond. Go on, give us a snare rush! Φορέω is also extremely versatile with many utility functions, such as master clock doubling, clock modulation, and for triggering and clocking fast sequences. It even works as a square wave overtone generator with PWM, tracking audio input signals up to 20kHz. Φορέω perfectly complements Στοιχεῖα, Λόγοι, Κλάσματα and Χρόνος, completing our Euclidean series of trigger processors. To watch a demo video of Phoreo click here. Read the review in Sound on Sound magazine: “Phoreo is a deceptively simple module that would be an asset in any moderate to large sequencing environment. It’s also a great way to add sophistication to a basic sequencer. Its features hang together neatly and the act of combining them under tasteful voltage control yields dividends every time.”


Phoreo Drawing Controls The knobs, from left to right, top to bottom, are:
  • Pulse Width Modulation 0 to 100%
  • Pulse Width Modulation CV
  • Multiply 1 to 16
  • Multiply CV
  • Repeat 1 to 16
  • Repeat CV
The jacks, from left to right, top to bottom, are:
  • PWM input
  • PWM CV
  • PWM output
  • Multiplier input
  • Multiplier CV
  • Multiplier output
  • Repeater input
  • Repeater CV
  • Repeater output
The two LEDs indicate:
  • Pulse Width Modulation
  • Repetitions
Getting Started Plug a clock signal into the PWM input. You can now adjust the pulse width on the output using the Pulse Width Modulation knob. Listen to the effect by triggering a sound from the PWM output. For best effect, use a sound with short attack, short release, and high sustain. Trigger the sound from the Multiplier output instead, leaving the clock signal in the PWM input. Turn the Multiply knob to hear the trigger rate increase by up to 16 times. Move the sound trigger to the Repeater output, and send a trigger to the Repeater input. You can now use the Multiply and Repeat knobs to generate bursts of variable rate and length. Turn the Pulse Width Modulation knob to hear the effect on the Repeater output. Extend the patch by adding CV inputs and adjusting the CV knobs.


  • Width: 10HP / 50.50mm
  • Height: 3U / 128.50mm
  • Depth: 20mm
  • Weight: 135g
  • 16-pin Doepfer/Eurorack
  • PTC fuse and diode protected
  • +5v: < 20mA
  • +12v: < 15mA
  • -12v: < 5mA
Note: requires +5v power rail! Impedance
  • Outputs: < 1.1k Ohm
  • Inputs: 100k Ohm
Voltage Range
  • Output low: 0v
  • Output high: 5.1v

Open Hardware

Open Hardware Logo Φορέω is Open Source and Open Hardware, published under the Gnu GPL. The source code, schematics and BOM are publicly available on GitHub. Please send your patches to us as pull requests on GitHub.