39
Detailed Editing for a Patch (PATCH Parameters)
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.
Parameter marked with a “
★
” can be controlled using specified MIDI messages.
fig.T-KF.e
LFO
Parameter
Value
Explanation
WAVEFORM
SIN, TRI,
SAW-UP,
SAW-DW,
SQR, RND,
BEND-UP,
BEND-DW,
TRP, S&H, CHS,
VSIN, STEP
Waveform of the LFO
SIN:
Sine wave
TRI:
Triangle wave
SAW-UP:
Sawtooth wave
SAW-DW:
Sawtooth wave (negative polarity)
SQR:
Square wave
RND:
Random wave
BEND-UP:
Once the attack of the waveform output by the LFO is allowed to develop in standard
fashion, the waveform then continues without further change.
BEND-DW:
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)
CHS:
Chaos wave
VSIN:
Modified sine wave. The amplitude of a sine wave is randomly varied once each cycle.
STEP:
A waveform generated by the data specified by LFO Step 1–16. This produces stepped
change with a fixed pattern similar to a step modulator.
* If you set this to “BEND-UP” or “BEND-DW,” you must turn the KEY TRIGGER parameter (p. 40) to
“ON.” If this is “OFF,” it will have no effect.
OFFSET
-100–+100
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.
RATE VALUE
★
0–127, Note
Modulation speed of the LFO
If you want the LFO rate to be synchronized with the tempo, this should be set in terms of a note value.
* This setting will be ignored if the Waveform parameter is set to “CHS.”
RATE DETUNE
0–127
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 VALUE is set to “note.”
DELAY TIME
0–127
Time elapsed before the LFO effect is applied (the effect continues) after the key is pressed (or released)
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.
* Set this according to your purpose as described in “How to Apply the LFO” (p. 40).
DELAY
KEYFOLLOW
(Delay Time
Keyfollow)
-100–+100
Adjusts the value for the DELAY TIME parameter depending on the key position, relative to the C4 key
(center C).
If this is set to a positive “+” value, the DELAY TIME will become shorter as you play notes higher
than the C4 key (middle C).
C4
C3
C2
C1
C5
C6
C7
0
+50
+100
-50
-100
Key
Time
Time Keyfollow
