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Owner's Manual - Roland

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Modulating Sounds (LFO1/2/Step LFO)<br />

An LFO (Low Frequency Oscillator) causes change over a<br />

cycle in a sound. Each tone has two LFOs (LFO1/LFO2),<br />

and these can be used to cyclically change the pitch,<br />

cutoff frequency and volume to create modulation-type<br />

effects such as vibrato, wah and tremolo. Both LFOs<br />

have the same parameters so only one explanation is<br />

needed.<br />

Patch LFO 1/2<br />

Waveform (LFO1/LFO2 Waveform)<br />

Selects the waveform of the LFO.<br />

Value<br />

SIN: Sine wave<br />

TRI: Triangle wave<br />

SAW-U: Sawtooth wave<br />

SAW-D: Sawtooth wave (negative polarity)<br />

SQR: Square wave<br />

RND: Random wave<br />

BND-U: Once the attack of the waveform output by the<br />

LFO is allowed to develop in standard fashion,<br />

the waveform then continues without further<br />

change.<br />

BND-D: Once the decay of the waveform output by the<br />

LFO is allowed to develop in standard fashion,<br />

the waveform then continues without further<br />

change.<br />

TRP: Trapezoidal wave<br />

S&H: Sample & Hold wave (one time per cycle, LFO<br />

value is changed)<br />

CHAOS: Chaos wave<br />

VSIN: Modified sine wave. The amplitude of the sine<br />

wave is randomly varied once each cycle of the<br />

waveform.<br />

STEP: A waveform generated by the data specified in<br />

LFO Step 1–16. This produces a fixed pattern of<br />

stepwise change, like that created by a step<br />

modulator.<br />

If you set this to “BND-U” or “BND-D,” you must turn the<br />

Key Trigger parameter to “ON.” If this is “OFF,” it will<br />

have no effect.<br />

LFO Rate (LFO1/LFO2 Rate) ★<br />

Adjusts the modulation rate, or speed, of the LFO.<br />

Value: 0–127, Note<br />

Creating a Patch<br />

LFO Rate sets the beat length for the synchronized tempo is<br />

synchronized with the tempo set in an external MIDI<br />

sequencer.<br />

(Example)<br />

For a tempo of 120 (120 quarter notes occur in 1 minute (60<br />

seconds))<br />

Setting LFO Rate<br />

(half note) 1 second (60 / 60 = 1 (second))<br />

(quarter note) 0.5 seconds (60 / 120 = 0.5 (seconds))<br />

(eighth note) 0.25 seconds (60 / 240 = 0.25 (seconds))<br />

This setting will be ignored if the Waveform parameter<br />

is set to “CHAOS.”<br />

Rate Detune (LFO1/LFO2 Rate Detune)<br />

LFO Rate Detune makes subtle changes in the LFO cycle rate<br />

(Rate parameter) each time a key is pressed. Higher settings<br />

will cause greater change. This parameter is invalid when<br />

Rate is set to “note.”<br />

Value: 0–127<br />

Offset (LFO1/LFO2 Offset)<br />

Raises or lowers the LFO waveform relative to the central<br />

value (pitch or cutoff frequency). Positive (+) settings will<br />

move the waveform so that modulation will occur from the<br />

central value upward. Negative (-) settings will move the<br />

waveform so that modulation will occur from the central<br />

value downward.<br />

Value: -100, -50, 0, +50, +100<br />

117<br />

Overview Connections VS-700C Console VS-700R I/O Fantom VS Appendix

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