Modulation Programs; Stereo Flange A; Stereo Flange B; Chorus - Yamaha SPX1000 Operation Manual

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 (L INI DLY): 0.1— 2600
milliseconds
Right Channel Initial (R INI DLY): 0.1— 2600
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 — 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

13. STEREO FLANGE A

14. STEREO FLANGE B

15.CHORUS

16. STEREO PHASING

17. TREMOLO

18. SYMPHONIC

18
The stereo flange effects produce a pleasant "swirling" sound
which can effectively thicken and add warmth to the sound of
an instrument. The flanging 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.
PARAMETERS ACCESSED BY THE PARAM KEY
Please note that STEREO PHASING does not have the F.B
GAIN parameter listed below, while TREMOLO and
SYMPHONIC have only the MOD FRQ and MOD DEPTH
parameters.
Modulation Frequency (MOD. FRQ): 0.05 Hz — 40 Hz
Sets the speed of modulation, and hence the rate at which the
effect varies.
Modulation Depth (1, 2) (MOD. DEPTH): 0% — 100%
Sets the amount of delay time variation, thus adjusting the
depth of the effect.
Modulation Delay (1, 2) (MOD. DLY): 0.1— 100
milliseconds
This sets the basic delay time from the initial direct sound to
the beginning of the flange effect.
Feedback Gain (F.B. GAIN): 0% — 99%
Determines the amount of flange signal which is fed back to
the input of the processor for further modulation. More
feedback increases the overall complexity, "strength" and
decay time of the effect.
Phase (PHASE): -180.0 deg — +180.0deg
(14. STEREO FLANGE B) Sets the phase between MOD.
DLY1 and 2.
Delay Time Modulation Depth (DM DEPTH): 0% —
100%
(15. CHORUS) Sets the amount of the width of the shaking
between L and R channel.
Amplitude Modulation Depth (AM DEPTH): 0% —
100%
(15. CHORUS) Sets the amount of the width of amplitude
variation.