Roland VC-1 D-50 TVF Time Variant Filter, TVA Time Variant Amplifier, ENV Envelope Generator

Overview of the VC-1

TVF (Time Variant Filter)

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This fitter passes lower frequency harmonics and cuts off the higher ones. By changing the cutoff point and the resonance, the waveform changes.

Cutoff Frequency

This sets the cutoff point. The cutoff point can be controlled by TVF ENV and any LFO (= Common parameter).

Resonance

This emphasizes the cut off point, making more unusual or electronic sounds.

TVA (Time Variant Amplifier)

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This controls the volume of the Partial.

Level

This determines the volume of the sound. When a synthesizer sound generators used, the level can be

controlled with the TVF ENV and LFO (Common Parameter) . When a PCM sound generator is used,

the TVA ENV controls the level.

ENV (Envelope Generator)

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This generators a control signal (envelope curve) which controls the pitch, timbre and volume of each Partial (sound generator).

P-ENV

This is the ENV which controls pitch. It can be set for two selected Partial at once.

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TVF ENV

This ENV controls the cutoff point, and can be set for each Partial separately.

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TVA ENV

This ENV controls the volume level. This is can be set for each Partial separately.

LFO (Low Frequency)

This oscillator generates low frequencies only.

Any of the three LFO’s can be used for the two partials, Vibrato, PWM growl or tremolo effects can be obtained using these LFO’s

*A different LFO can be used for each section or a Partial Parameters.

10LFO-1

This can control Pitch, Pulse Width, Cutoff Frequency or Level.

11LFO-2

This can control Pulse Width, Cutoff Frequency or Level.

12LFO-3

This can control Pulse Width, Cutoff Frequency or Level.

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