Modulation, Stereo flange, Mod freq. range: 0.1 ~ 40.0 hz – Yamaha SPX90 II User Manual

Page 13: Mod depth. range: 0 ~ 100, Mod delay time. range: 0.1-100.0 msec, F.b. gain. range: 0 - 99, Mod freq. range: 0.1 - 40.0 hz, Delay modulation depth. range: 0 - 100, Amplitude modulation depth. range: 0 - 100

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MODULATION

STEREO FLANGE

CHORUS

A combination of Delay and LFO (Low Frequency

Oscillation) modulation, the popular Flanging effect
can dramatically thicken the sound of keyboard in

struments, or prodpce thé "aircraft" sound popular
among guitarists. Basically, a short delay time is varied
with LFO modulation so that the delayed signal moves
in relation to the direct signal. The resultant variations
in pitch and stereo imaging are known as "flanging".

(dB)

DIRECT

SIGNAL

MOD. DEPTH

UR)/ R(L)

•(TIME)

MOD. DELAY TIME

With the Chorus effect, a violin, keyboard, or guitar
can sound like an entire ensemble. Chorusing splits
the incoming signal into three signals placed at the
center, left, and right in the stereo image. Each signal

is delayed slightly, and then its delay time and level
are modulated by the LFO (Low Frequency Oscillator).

(dB)

DIRECT SIGNAL

AMPLITUDE
MODULATION DEPTH

•(TIME)

DELAY MODULATION DEPTH

1. MOD FREQ. Range: 0.1 ~ 40.0 Hz

Sets the speed of modulation, and hence the rate
at which the effect varies.

2. MOD DEPTH. Range: 0 ~ 100%

This sets the amount of delay time variation, thus
adjusting the "depth" of the effect. At the maximum
setting, the delay time is varied by -t-/-4 msec.

3. MOD DELAY TIME. Range: 0.1-100.0 msec

This sets the basic delay time from the initial direct
sound to the flange effect. When set to lower than

1 msec, more high-frequency variation is produced,

while a setting higher than 3 msec will create more

low-frequency variation.

4. F.B. GAIN. Range: 0 - 99%

Sets the amount of flange signal which is fed back
into the circuit for further modulation. This controls

the complexity of the effect, its "strength," and its

overall decay time.

1. MOD FREQ. Range: 0.1 - 40.0 Hz

Sets the delay time modulation speed (frequency).

2. DELAY MODULATION DEPTH. Range: 0 -

100

This sets the amount by which the delay time of
one delay signal is varied in relation to the other.
At the maximum setting, the delay time is varied
by + /-4 msec.

3. AMPLITUDE MODULATION DEPTH. Range:

0 - 100%
This sets the amount by which the amplitude (level)

of the input signal is varied.