Echo Program; N 20. Stereo Echo; Modulation Programs; N 21. Stereo Flange - Yamaha SPX900 Operation Manual

ECHO PROGRAM

n 20. STEREO ECHO

The stereo echo effect offers independently variable left and
right channel initial delays and echo intervals.
PARAMETERS ACCESSED BY THE PARAM KEY
Left Channel Feed Back Delay (LFB DLY):
0.1 – 740.0 milliseconds
Right Channel Feed Back Delay (RFB DLY):
0.1 – 740.0 milliseconds
After the initial delay produced by the INI DLY parameters.
the time between subsequent repeats is determined by the left
and right channel interval parameters.
Left Channel Feedback Gain (Lch F. B):
-99% – +99%
Right Channel Feedback Gain (Rch F.B):
-99% – +99%
Individually set the amount of the left or right channel delay
signal fed back to the input of the processor. The higher the
feedback gain setting, the greater the number of delayed
repeats produced for the corresponding channel.
High Frequency Feedback (HIGH): x0.1 – x1.0
Controls feedback in the high-frequency range. The high-
frequency feedback is reduced as the value of this parameter
is decreased.
PARAMETERS ACCESSED BY THE INT PARAM
KEY
Left Channel Initial Delay (L INI DLY): 0.1 – 740.0
milliseconds
Right Channel Initial Delay (R INI DLY): 0.1 – 740.0
milliseconds
These parameters individually set the time between the direct
sound of the instrument and the first repeat heard from the left
and right channels.
High-pass Filter Frequency (HPF FRQ.): THRU,
32 Hz – 1.0 kHz
Permits rolling off the low-frequency content of the reverb
signal above the set frequency. The HPF is OFF when set to
THRU.
Low-pass Filter Frequency (LPF FRQ.): 1.0 – 16 kHz,
THRU
Permits rolling off the high-frequency content of the reverb
signal above the set frequency. The LPF is OFF when set to
THRU.

MODULATION PROGRAMS

n 21. STEREO FLANGE

n 22. CHORUS 1

n 23. CHORUS 2

n 24. STEREO PHASING

n 25. TREMOLO

n 26. SYMPHONIC

The stereo flange effects produce a pleasant "swirling" sound
which can effectively thicken and add warmth to the sound of
an instrument. The chorus effect is produced by varying the
delay between two identical signals. thus producing a complex
varying "comb filter" effect.
Phasing is basically a "gentler" version of the flange effect,
lending a smooth. animated quality to the original sound.
The tremolo effect is produced in the same way as the flange
effect, but has a "bigger," more sweeping sound. The
symphonic effect adds richness and life to the sound.
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