Qu-Bit Electronix - EON


Into just two HP QuBit Electronix squeezes as much as possbile into the EON: an attack-decay envelope generator with cycle mode, a combination of a square wave oscillator and a triangle LFO and then a digital noise generator with downsampling and random gates. Two outputs carry entirely different signals. Oh yeah, this wee thing is even voltage controllable! Good job, QuBit!



EON's three functions are available alternatively and are selected with the upper switch: left = envelope, center = oscillator, right = noise. Each function offers two modes you can select with the nrm/alt switch and the two outputs emit different signals.

Envelope generator: An attack-decay envelope whose times are set with the attack and decay potentiometers. The envelope must be triggered via the button or a gate/trigger signal (above 2.5V) at the trigger input. Press the trigger button for three seconds to enter cycle mode: the envelope turns into a LFO with reset via trigger.

  • switch position "nrm" = linear characteristic. Maximal envelope length: 4.3 seconds.
  • switch position "alt = exponential characteristic. Maximal envelope length: 2 seconds.
  • CV input modulates the decay time.
  • upper output: end-of-attack gate output. LED shows activity.
  • lower output: envelope output. Range depends on jumper setting: 0-5V or 0-10V. Trigger button shows the shape of the envelope

Oscillator: Square wave oscillator and a triangle LFO in one. Pitch is set with the Freq and Fine potentiometers. Trigger function acts as a LFO reset.

  • switch position "nrm" = oscillator's pitch tracking is 1V/octave.
  • switch position "alt = oscillator's pitch tracking is quantized to semitones.
  • CV input: 1V/octave pitch input or quantized input.
  • upper output: audio signal (±5V). LED shows frequency
  • lower output: triangle LFO. Range depends on jumper setting: 0-5V or 0-10V. Trigger button shows frequency.

Noise generator producing digital noise and random gates. The atk/freq control sets the noise downsampling frequency, the dcy/fine potentiometer determines the probability of random gates. Trigger button displays the noise signal and the LED visualizes the random gates.

  • switch position "nrm" = constant noise
  • switch position "alt = enveloped noise whose level is modulated by an evelope. The atk/freq potentiometer also sets decay time. Trigger function fires the envelope.
  • CV input modulates the downsampling noise frequency; additionally in "enveloped noise" mode it sets the envelope's decay time.
  • upper output: random gate signals
  • lower output: noise signal


trigger input, CV input, two signal outputs


3U Eurorack module, 2HP wide, 46mm deep
power consumption: 60mA @ +12V and 10mA @ -12V

0.04 kg
Article Number

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