Roland Sonar V-Studio VS-700 - Manual (Page 117)

117
Creating a Patch
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An LFO (Low Frequency Oscillator) causes change over a
cycle in a sound. Each tone has two LFOs (LFO1/LFO2),
and these can be used to cyclically change the pitch,
cutoff frequency and volume to create modulation-type
effects such as vibrato, wah and tremolo. Both LFOs
have the same parameters so only one explanation is
needed.
Patch LFO 1/2
Waveform (LFO1/LFO2 Waveform)
Selects the waveform of the LFO.
Value
SIN: Sine wave
TRI: Triangle wave
SAW-U: Sawtooth wave
SAW-D: Sawtooth wave (negative polarity)
SQR: Square wave
RND: Random wave
BND-U: Once the attack of the waveform output by the
LFO is allowed to develop in standard fashion,
the waveform then continues without further
change.
BND-D: Once the decay of the waveform output by the
LFO is allowed to develop in standard fashion,
the waveform then continues without further
change.
TRP: Trapezoidal wave
S&H: Sample & Hold wave (one time per cycle, LFO
value is changed)
CHAOS: Chaos wave
VSIN: Modified sine wave. The amplitude of the sine
wave is randomly varied once each cycle of the
waveform.
STEP: A waveform generated by the data specified in
LFO Step 1–16. This produces a fixed pattern of
stepwise change, like that created by a step
modulator.
If you set this to “BND-U” or “BND-D,” you must turn the
Key Trigger parameter to “ON.” If this is “OFF,” it will
have no effect.
LFO Rate (LFO1/LFO2 Rate) ★
Adjusts the modulation rate, or speed, of the LFO.
Value: 0–127, Note
LFO Rate sets the beat length for the synchronized tempo is
synchronized with the tempo set in an external MIDI
sequencer.
(Example)
For a tempo of 120 (120 quarter notes occur in 1 minute (60
seconds))
This setting will be ignored if the Waveform parameter
is set to “CHAOS.”
Rate Detune (LFO1/LFO2 Rate Detune)
LFO Rate Detune makes subtle changes in the LFO cycle rate
(Rate parameter) each time a key is pressed. Higher settings
will cause greater change. This parameter is invalid when
Rate is set to “note.”
Value: 0–127
Offset (LFO1/LFO2 Offset)
Raises or lowers the LFO waveform relative to the central
value (pitch or cutoff frequency). Positive (+) settings will
move the waveform so that modulation will occur from the
central value upward. Negative (-) settings will move the
waveform so that modulation will occur from the central
value downward.
Value: -100, -50, 0, +50, +100
Modulating Sounds (LFO1/2/Step LFO)
Setting LFO Rate
(half note) 1 second (60 / 60 = 1 (second))
(quarter note) 0.5 seconds (60 / 120 = 0.5 (seconds))
(eighth note) 0.25 seconds (60 / 240 = 0.25 (seconds))
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