LA67 WFM Oscillator

Wave Form Mutator

8 HP Eurorack module

An analogue VCO with a continuously variable WFM waveform, FM, sync, PWM, and VCA-controlled main output.

Features

• Linear and exponential FM, hard sync, and PWM.
• A VCA on the WFM output supports amplitude modulation.
• Audio-rate waveform modulation can produce wavefolder-like timbres.

Controls & Jacks (16)

• LEVEL— Controls the amplitude of the WFM output.
• MOD Amount— Sets the depth of waveform-shape modulation received at the MOD input.
• FM Amount— Sets the amount of frequency modulation applied from the FM input to all three outputs.
• WFM— Sets the WFM output shape, morphing clockwise from triangle to saw to pulse and then variable pulse width.
• FREQ— Provides coarse tuning of the output frequency.
• TUNE— Provides fine tuning of the output frequency.
• PULSE Output— Fixed-duty bipolar pulse-wave output, useful for synchronizing two WFM VCOs.
• TRIANGLE Output— Bipolar triangle-wave output, useful for audio-rate modulation of a second WFM.
• V/OCT Input— 1 V/octave pitch-control input.
• WFM Output— Main bipolar variable-waveform output, morphing from triangle through saw to pulse/variable pulse width.
• EXP/LIN— Selects exponential or linear frequency modulation for the FM input.
• LEVEL Input— CV input controlling the VCA on the WFM output; unipolar CV provides VCA operation and bipolar signals provide amplitude modulation.
• MOD Input— CV input for modulating the WFM output waveform shape; scaled by the Mod Amount control.
• SYNC Input— Hard-sync input; synchronization occurs on the falling edge of the incoming signal.
• PWM Input— Input that modulates the pulse wave of the WFM output.
• FM Input— AC-coupled input for linear or exponential frequency modulation, selected with the EXP/LIN switch and scaled by the FM Amount control.

Explore the interactive WFM Oscillator panel on BleepDex — tap any control to learn what it does.