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Five12 QV-L Quad Variable LFO

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Quad Variable LFO

The QV-L is a quad low-frequency oscillator with a variety of waveforms, flexible modulation options, clock sync and presets.

Waveforms included as of Firmware 0.9.0:

  • Sine, Triangle, Saw Up, Saw Down, Shark Left and Right, and Square waves, all with variable shape controls (pulse-width for the square wave).
  • Sample & Hold with selectable source (CV in, any other LFO, etc).
  • Three morphing waves: Sine to Tri, Saw to Tri, Saw to Square
  • Stair-step up, down and up-down
  • A Sine / Saw / Square sequence-able waveform.
  • A variable-pulse width Square wave sequence-able waveform.
  • A three output Lorenz attractor chaotic waveform.
  • A Perlin-noise style random waveform
  • A Logistic Map chaotic waveform generator.

LFO Rates can be set using a variety of modes. There are two logarithmic response modes (Wide and Slow) to cover traditional ranges. There is a Hz mode for specifying the rate from 1Hz to 246Hz. There are also 3 tempo-based modes: 16th, Beat and Bar.

The QV-L's tempo can be set internally, or via a 16th note tempo clock to a Gate input. The QV-L can also be connected to a Vector Sequencer for sync and bi-directional MIDI communication.

The QV-L also includes two simple, linear EGs for modulation duties. The EGs currently have two modes: AR: Attack/Release, and ASR: Attack/Sustain/Release.

The QV-L supports extensive modulation via 8 modulation busses, with selectable sources, destinations and amounts. Sources include 4 CV inputs, all 4 LFOs, and either of two internal envelope generators.

In order to accommodate multi-output algorithms such as the Lorenz Attractor, and for general versatility, each of the 4 CV outputs can be custom mapped. Output processing also includes a selection of handy operations (invert, rectify, etc) and both sale and offset controls.

LFOs can be reset (and EGs triggered) from either of the two front-panel Gate Inputs, or from the TrigA or Trig B buttons.

Most edit pages have animated waveform displays.

The Main Edit page offers 6 customizable parameters for each performance control.

All settings can be saved via onboard presets in flash memory. Up to 40 presets can be saved.

12 HP
35 mm deep
Current Draw
120 mA +12V
20 mA -12V
type ["LFO","Envelope"]
_hp 12