Chapter 8: Signal Modifiers | VCA
⚛ VCA is a voltage controlled amplifier, although it normally attenuates, rather than amplifies.
⚛ Additional Information
⚛ The following is a transcript of the narration:
✸ Signal Modifiers: VCA
✸ VCA uses a voltage controlled input to adjust the level of any signal, sent through it.
✸ VCA is an analogue multiplier and a level control.
Patch 5 VCA
⚛ The following is a transcript of the narration:
✸ Patch 5 VCA
✸ Connect sawtooth wave output to VCF input.
✸ Send Low Pass output to VCA audio input 1.
✸ Open signal in and gain on the VCA, Cut Off on the VCF and Tune on the VCO.
✸ Find the timbre that you like.
✸ Set VCO 1 to LFO mode and connect it to the Envelope Generator gate input.
✸ Output of the envelope connect to VCA external control voltage input.
✸ Send the control voltage signal in.
✸ Adjust Cut Off, Attack, Decay, Sustain, Release, Time Range, and LFO rate until you hear "beat-like" sound.
✸ Adjust the timbre of the sound with VCF to hear available range of frequencies.
✸ Change the tone to your liking.
✸ This method is required to create periodicity in the constant unchanging tone.
Patch 6 VCA
⚛ The following is a transcript of the narration:
✸ Patch 6 VCA
✸ Connect sawtooth wave output to VCF input.
✸ Send Low Pass output to VCA audio input 1.
✸ Find the timbre that you like.
✸ Set VCO 1 to LFO mode and connect it to the Envelope Generator gate input.
✸ Output of the Envelope send to CV input of the VCA.
✸ Adjust the Envelope and LFO parameters until you hear the Envelope shaping the waveform.
✸ Here we are using VCA to apply the shape of the Envelope to the loudness of the audio signal.
Bonus Patch
✸ Bonus Patch
✸ While saw tooth waveform is sent to VCF -> VCA chain, use the splitter to multiply LFO output.
✸ Feed both VCA CV input and Envelope Gate with LFO.
✸ Connect output of EG to Cut Off CV input of the VCF.
✸ Play with LFO rate and Envelope to create "Skrillex-type" of sound.