Quadrature LFO

Description

The Quadrature LFO is generating an sine wave and 3 phase-shifted copies of it:
by 90° (cosine), 180° (inverted sine) and 270° (inverted cosine).
The frequency of the LFO can be voltage controlled, the CV input is attenuverted.

You can use the LFO in a wider frequency range, from very low oscillations up to above the audio range. There is another CV-input, which let´s the LFO to be pitched by volt/octave, the tracking is quite ok over 2-3 octaves. A interesting possibility is to patch an output of the module to the Rate CV input, so you can create new waveforms that way while still controlling the Lfo by the V/Oct. Input. Using more than one module, you can create complicated and interesting output waveforms, up to pseudo-chaotic signals, escpecially, when 2 or more LFO´s modulating each other by pitch.

Features

• generates a sine wave and 3 phase shifted copies of it: 90°, 180°, 270°
• frequency can be manually controlled
• frequency can be controlled by an external control voltage
• 3 frequency ranges selectable by switch
• frequency range from less than a Hz beyond the audible range

Functions

CV Input jack – Input for CV for frequency control, attenuated by CV Pot
V/Oct Input jack – Input for CV in Volt/Octave Range, unattenuated
Sin Out jack 0° – Output for the unshifted sine wave
Cos Out jack 90° – Output for the 90° shifted sine wave / cosine
Inv Sin Out jack 180° – Output for the 180° shifted sine wave / inv. Sine
Inv Cos Out jack 270° – Output for the 270° shifted cosine wave / inv. Cosine
Frequency Range Switch – switches between 3 frequency ranges
Rate Knob – controls the LFO´s frequency
CV Attenuator – attenuates the CV going into the CV input jack

Spec: