56
Creating a Patch
Modulating Sounds (LFO)
fig.03-19_50
For details on the setting, refer to
“How to Make the Patch
Settings”
(p. 39).
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.
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
If you set this to “BD-U” or “BD-D,” you must turn the 1:/2: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 a 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 (1:/
2: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
Delay Time (LFO1/LFO2 Delay Time)
Delay Time (LFO Delay Time) specifies the time elapsed before the
LFO effect is applied (the effect continues) after the key is pressed (or
released).
Value:
0–127
After referring to
“How to Apply the LFO”
(p. 57), change the
setting until the desired effect is achieved.
When using violin, wind, or certain other instrument sounds in a
performance, rather than having vibrato added immediately
after the sounds are played, it can be effective to add the vibrato
after the note is drawn out somewhat. If you set the Delay Time
in conjunction with the Pitch Depth parameter and Rate
parameter, the vibrato will be applied automatically following a
certain interval after the key is pressed. This effect is called
Delay Vibrato
.
1
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))
2
Reference_e.book 56 ページ ２００３年７月１４日 月曜日 午後３時２５分
