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Vermona fourMulator Quad Digital LFO


Quad Modulation Trigger Engine. With fourMulator Vermona created a digital quad-LFO-module offering a lot more than typical cyclic modulations. Because of the individual modulators’ (LFOs) ability to sync to a common master clock, you are able to both create individual sound movements or complex and rhythmical modulation structures.

Functions: Clock Generator , LFO , Quad
Height: 3U
Width: 34hp
Out of stock
Availability: In Stock
Manufacturer: VermonaCategories: Equipment, Eurorack, Modulation

The fourMulator is a quad digital, voltage controllable LFO with Tap-Tempo and LFO synchronisation to an external clock. Synchronisation to an adjacent LFO is possible as well and gives you the possibility to shift the LFO´s phase.

The fourMulator contains four (digital) LFOs with following waveforms: rising and falling sawtooth, square, triangle, sine and random (S&H) and it works beyond this as a clock generator with tap-tempo function.

Each LFO can be free-running, synchronized to the master clock or synchronized to the preceding LFO. When synched to the clock the LFO can oscillate in a fraction or multiplicator of the clock. When synched to the preceding LFO you can shift it´s phase (and the start of the wave form) continuously up to 180°. Each LFO (called "modulator" in fourmulator language) has a reset input and CV input that always affects the function of the Speed/Phase control, either frequency, clock divisor, clock multiplier or phase. Each modulator has a wave form output and a trigger output that fires a trigger at each start of a waveform. Furthermore you´ll find a master reset input affecting all modulators that don´t use the individual reset input. The Trigger Sequence output carries the sum of all synchronised trigger impulses. By shifting the modulators´ phases you can generate rhythmical structures.


  • Frequency range: 0.05 Hz .. 100 Hz
  • Control elements: WAVE, SPEED, SYNC
  • WAVE outputs: -5 V .. +5 V
  • TRIGGER outputs: +12 V, 10 ms
  • CV inputs: -5 .. +5 V
  • RESET inputs: min. +3.5 V, max. +12 V

Clock-Generator (CLK)

  • Control elements: TAP button
  • CLK OUT output: +12 V, 10 ms
  • CLK IN input: min. +3.5 V, max. +12 V

Further connectors

  • TRIG SEQ output: +12 V, 10 ms
  • RESET Eingang: min. +3.5 V, max. +12 V

Power Consumtion

  • +12 V: 120 mA
  • -12 V: 10 mA

Dimensions / Weight

  • Width / Height: 34 HP (ca. 173 mm) / 3 U
  • Depth: 25 mm
  • Weight: 365 g


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Vermona fourMulator Quad Digital LFO