Yamaha SPX90 II Operating Manual page 12

This effect, commonly used in contemporary record-
ings, produces independently variable left-and right-
channel signal delays. The result is an intriguing "doubl-
ed" sound.
1. LEFT CHANNEL DELAY TIME. Range: 0.1 ~ 2000.0
msec
Permits highly accurate setting of the left channel
delay following the direct sound.
2. LEFT CHANNEL FEEDBACK GAIN. Range:
- 99% ~ + 99%
Sets the amount of delay signal fed back to the in-
put circuitry. The higher the feedback gain setting
the greater the number of delay repeats produced.
A negative value setting produces out of phase
feedback.
3. RIGHT CHANNEL DELAY TIME. Range: 0.1~
2000.0 msec
Sets the delay time of the right channel.
4. RIGHT CHANNEL FEEDBACK GAIN. Range: - 99%
~ + 9 9 %
Permits setting the feedback gain setting of the right
channel delay.
5. HIGH (FEEDBACK HIGH). Range: 0.1 ~ 1.0
Controls feedback of the high-frequency range. The
high frequency feedback is reduced as the value of
this parameter is reduced.
11
Similar to Delay, Echo brings added dimension and force
to both instrumental and vocal music. While Reverbera-
tion recreates an abundance of partial sound reflec-
tions, and Delay produces a limited number of signal
repetitions, Echo can produce limitless signal
r e p e t i t i o n s .
1. LEFT CHANNEL DELAY TIME. Range: 0.1 ~ 1000.0
msec
After this delay time has elapsed, the first echo will
appear. Subsequent echoes will appear at the same
time interval, the number of echoes depending on
how the Feedback Gain parameter is set.
2. LEFT CHANNEL FEEDBACK GAIN. Range: -99%
~ + 99%
This parameter permits adjustment of the number
of echoes that follow the direct signal, from zero to
a virtually infinite repeat at the maximum setting.
The overall decay time of the effect is proportionate
to the Feedback Gain setting.
3. RIGHT CHANNEL DELAY TIME. Range: 0.1~
1000.0 msec
4. RIGHT CHANNEL FEEDBACK GAIN. Range: - 99%
~ + 99 %
Parameter 3 and 4 have the same function as those
of 1 and 2 but the signal will be produced from the
Right output.
5. HIGH (FEEDBACK HIGH). Range: 0.1 ~ 1.0
Determines the portion of high frequency feedback.
The lower the value, the less high frequency is
produced.