Twin waves

Voltage-controlled Dual VCO/LFO
  • Two oscillators independently set as VCO or LFO
  • Features in VCO mode:
    • V/Oct tracking over 10 octaves
    • Through zero oscillator
    • Sub-octave output
    • Linear FM at audio rate
    • Hard & soft synchronization
    • Quantizer with various scales
    • Algorithm-based synthesis to choose among:
      • Wave shaping
      • Phase modulation
      • Phase positioning of multiple waves
      • 5 stacked oscillators in tunable unison
      • Self-sync with phantom oscillator
      • Additive synthesis (7 waves)
      • Variable bit reduction (bit-crushing)
      • Ring modulator with its own 2nd oscillator
      • Noise with LPF, BPF, or resonant filter
  • Features in LFO mode:
    • Simultaneous signal and trigger outputs
    • Wave synchronization
    • Clock controlled rate with multiplier and divider
    • CV and knob control of output level
    • Algorithm based wave engine with a selection of:
      • Wave shaping
      • Phase modulation
      • Random levels and vectors (also Brownian)
      • Randomly spaced triggers and waves
  • Display with contextual icons and instant reminder help text
  • LEDs indicating potentiometer vs. value matching, switch settings and output levels
  • Automatically saved settings for instant recall at power on
  • Firmware update via a simple audio file
Firmware 1.11 main additions
  • Audio algo selection by CV
  • Quantizer's base note settable + CV control
  • Relative/Absolute modes in Self-Sync algorithms
  • Enriched LED feedback

The driving idea behind the Twin waves voltage-controlled dual oscillator/LFO is to offer two interesting oscillators in a skiff-friendly and compact size. To achieve that challenge, we built the product’s architecture on the concept of pre-defined algorithms, where the most useful configurations and their matching parameter are ready to use.


Dimensions mm inches Eurorack
Height 128.40 5.06 3HE
Width 40.00 1.57 8HP
Depth behind panel
(with supply cable inserted)
37.40 1.47


Supply rail Current draw
+12V 46mA
-12V 18mA
+5V 0mA

I'm so glad I got's an absolute gem.
Man this thing looks so nice, great features for a very reasonable price.
It's a monster (a dual monster).
The price/performance/features/HP ratio is just fantastic, IMHO.


Audio clips

Set as dual VCO in OFFSET mode + SUB out, all mixed and sent to a Korgasmatron (filter modulated with a LFO sync of a second Twin waves using browian vectors algo.
  • VCO1: Unison SAW (note = C), Quantizer = minor
  • VCO2: Additive Odd (note = F), Quantizer = minor, harmonic content modulated from a second Twin waves in LFO mode with Brownian vectors algo
Overall FX: Black hole DSP + Z-DSP

  • First section VCO: Supersaw with phase spread driven by second section's LFO
  • Second section as LFO: Sine in Sync mode with mult/div ratio manually tweaked. Sent to VCO param + Korga for filtering.
Modcan Dual LFO introduced in the second part.

Changing algo on the fly manually.

  • Beats (Analog Rythm) and bassline (Twin waves + SSF Pole ZERO)
  • Sound effects (Twin waves + SSF MMF)

Inspiration technology to let you create the difference
Klavis Modular Systems
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