VCO

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The voltage-controlled oscillator (VCO) is a typical analog audio oscillator with 1V/Oct pitch tracking for musical purposes. VCOs are one of the most basic audio sources in a synthesizer. Their sound is usually further shaped and refined by filters, wavefolders, voltage-controlled amplifiers (VCAs) and other audio effects.

Module power consumption: 16 mA

Inputs

• CV1 - control voltage input for pitch frequency (1V/Oct)
• CV2 - another control voltage input for pitch frequency (1V/Oct)
• MOD - control voltage input for modulating either frequency or the square wave's pulse width
• PW - dedicated pulse width modulation control voltage input
• SYNC - resets the waveform when a trigger signal is received

Outputs

• 2x RAMP - ramp/sawtooth wave output
• 2x TRI - triangle wave output, quieter than the other outputs so it might need amplification via the 2SIGNALAMP module for example
• 2x SQUARE - square wave output
• BUS CV - pitch control voltage form the MASTER I/O module's MIDI-CV converter

Controls

• MOD DEPTH Potentiometer - attenuator for the MOD input control voltage
• MOD DEPTH Switch - switches the MOD control voltage target between frequency and pulse width
• COARSE - coarse tuning of the VCO frequency
• FINE - fine tuning of the VCO frequency
• PULSEWIDTH - manual control over the square wave's pulse width, control voltage modulation is added to this potentiometer setting

Patch Suggestions

RSKT made this super comprehensive introduction video with some very nice demo patches: https://youtu.be/x_66mesl7Ls

This video by Synths & Things explains the ins and outs of this module really well: https://youtu.be/vBKg-7lSAus

This video by The Tuesday Night Machines demonstrates frequency modulation sounds: https://www.youtube.com/watch?v=jVtANkhEBGY