Roland MV-8000 Owner's Manual download pdf (Page 57)

Effect

Virtual VCO + Ring

This reproduces the VCO (Voltage Controlled

Oscillator) virtually. It comprises two oscillators, OSC1

and OSC2, a noise generator, and ring modulator.

Settings include those for the waveforms that are the

basis of synthesizer sounds and pitch settings for the

two oscillators.

OSC1 (Oscillator 1)

Wave

Sets the waveform for the sound produced by OSC1.

Width

Sets the pulse width when the “pulse wave” (Pul) is

selected for the OSC1 waveform. Increasing the value

narrows the pulse width. This has no effect if the OSC1

waveform is not set to “pulse wave” (Pul).

Value: 0–100

fig.10-36

PWM (Pulse Width Modulation)

When OSC1 Wave is set to “pulse wave” (Pul), this set

the depth which the LFO vibrates the pulse width. This

gives the characteristic cyclical change in tone.

Increasing the value deepens the effect. This is

effective only when the OSC1 waveform is set to

“pulse wave” (Pul).

Value: 0–+100

When both OSC1 Pulse Width and OSC1 Pulse Width

Modulation settings are large, the periodic or cyclical sound

may become inaudible.

Coarse/Fine

Sets the pitch of the sound from OSC1. With 0 as the

reference, coarse tuning adjusts the pitch in semitone

increments, fine tuning in cents (1/100 of a semitone).

Coarse Value: -24–+24

Fine Value: -100–+100

PitchKF (Pitch Key Follow)

This setting determines whether the pitch of Oscillator

1 (hereafter OSC1) changes according to the Note

Number in Common (On) or not (Off).

Value: Off, On

X-Mod. (Cross Modulation)

Sets the depth of the OSC1 cross modulation effect (the

modulation of the OSC1 pitch by oscillation from the

OSC2). As the value is increased, the increased

overtones make the sound more powerful.

Value: 0–100

OSC2 (Oscillator 2)

These are the settings for OSC2. The effect of these

settings are the same as those in OSC1 (there is no cross

modulation included in OSC2).

Ring Mod. (Ring Modulator)

Src1 (Ring Modulator Source 1)

Src2 (Ring Modulator Source 2)

You can select from two ring modulator inputs.

Besides the oscillators OSC1 and OSC2, “Noise” or

“ExtIn” (external input) may also be selected.

Value: Src1 OSC1, OSC2, Noise, ExtIn

By multiplying the ring modulator’s two inputs each

other, you can create sounds that include numerous

overtones not found in either waveform. You can get

metallic sounds unrelated to any sense of harmony.

To play the VCO’s sounds (OSC1, OSC2, noise

generator, and ring modulator), raise the volume level

of each in the VCF mixer at the next stage. The

synthesizer sounds are tuned to A4 (440.0 Hz). If you

want to have A4 set to 442 Hz, set the Fine reference

setting of OSC1 and OSC2 above not to ±0, but to +8.

Value

Explanation

Tri

(Triangle wave)

A clear sound with few overtones.

Pul

(Pulse wave)

This sound varies depending on the

settings in the following parameters

(Width, PWM).

Saw

(Sawtooth wave)

A thick sound filled with overtones.

Width=0

Width=50

Width=80

Width=100

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Roland MV-8000 Owner's Manual Page 57

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