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INTRODUCTION Congratulations on your purchase of a Yamaha SPX90 Digital Multi-Effect Processor. The SPX90 is an amalgam of advanced acoustical research and digital technology designed to provide musicians and home recording enthusiasts with a wide range of exciting effects. The SPX90 Digital Multi-Effect Processor utilizes highly refined LSI (Large Scale Integration) technology to create natural reverberation. Not only is its assortment of 30 preset effects comprehensive enough to suit most studio and performance applications, the SPX90 also allowsyou to create up to 60 additional effects and store them for instant recall. Your SPX90 can create effects for beyond mere reverberation, though that in itself is of a truly superior quality. A variety of echo, delay, and special effects- each with comprehensive parameter adjustments-can be accessed at the touch of a switch. And as the SPX90 is MIDI-compatible, it can be programmed to apply separate reverberation effects to a variety of MIDI-compatible instruments. Your SPX90 Digital Multi-Effect Processor will prove extremely useful in a variety of applications: acoustic electric, PA, MIDI instrument, and home recording systems. In order to take advantage of the vast potential of this component, we urge you to study this manual before connecting the SPX90 to your system. We at Yamaha thank you, and wish you years of enjoyment with your SPX90. CONTENTS PRECAUTIONS 2 TREMOLO 13 FRONT PANEL 3 SYMPHONIC 13 REAR PANEL 4 PITCH CHANGE 13 BASIC OPERATIONS 5 PREEZE 14 PRESET PROGRAM SELECTION 5 REVERB & GATE 17 EDIT: CHANGING PARAMETERS 5 GATE STORE: SAVING EDITED PROGRAMS 6 ADR-NOISE GATE 17 OUTPUT BALANCE AND LEVEL COMPRESSOR 18 ROGRAMMING 7 PAN BYPASS 7 AUTO PAN 19 UTILITY FUNCTIONS 8 TRIGGERED PAN 19 EDIT TITLE 8 DELAY VIBRATO 20 MIDI FUNCTIONS 8 PARAMETRIC EQ 20 FOOTSWITCH MEMORY RECALL RANGE... 9 SAMPLE APPLICATIONS 21 DESCRIPTION OF PROGRAMS AND SPECIFICATIONS 23 PARAMETERS 10 MIDI DATA FORMAT 24 REVERB 10 ROM CONTENTS AND CONTROLABLE ER1, ER2 10 PARAMETERS 25 DELAY 11 EARLY REFLECTION MODE CHART 26 ECHO 12 ROOM SIZE CHART 27 MODULATION BLOCK DIAGRAM 29 STEREO FLANGE 12 DIMENSIONS 29 CHORUS 12 USER PROGRAMMING TABLE 30 STEREO PHASING 13 MIDI IMPLEMENTATION CHART 31 1

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INTRODUCTION
Congratulations
on
your
purchase
of
a
Yamaha
SPX90
Digital
Multi
-Effect
Processor.
The
SPX90
is
an
amalgam
of
advanced
acoustical
research
and
digital
technology
designed
to
provide
musicians
and
home
recording
enthusiasts
with
a
wide
range
of
exciting
effects.
The
SPX90
Digital
Multi
-Effect
Processor
utilizes
highly
refined
LSI
(Large
Scale
Integration)
technology
to
create
natural
reverberation.
Not
only
is
its
assortment
of
30
preset
effects
comprehensive
enough
to
suit
most
studio
and
performance
applications,
the
SPX90
also
allows
you
to
create
up
to
60
additional
effects
and
store
them
for
instant
recall.
Your
SPX90
can
create
effects
for
beyond
mere
reverberation,
though
that
in
itself
is
of
a
truly
superior
quality.
A
variety
of
echo,
delay,
and
special
effects
each
with
comprehensive
parameter
adjustments
—can
be
accessed
at
the
touch
of
a
switch.
And
as
the
SPX90
is
MIDI
-compatible,
it
can
be
programmed
to
apply
separate
reverberation
effects
to
a
variety
of
MIDI
-compatible
instruments.
Your
SPX90
Digital
Multi
-Effect
Processor
will
prove
extremely
useful
in
a
variety
of
applications:
acoustic
electric,
PA,
MIDI
instrument,
and
home
re-
cording
systems.
In
order
to
take
advantage
of
the
vast
potential
of
this
com-
ponent,
we
urge
you
to
study
this
manual
before
connecting
the
SPX90
to
your
system.
We
at
Yamaha
thank
you,
and
wish
you
years
of
enjoyment
with
your
SPX90.
CONTENTS
PRECAUTIONS
2
TREMOLO
13
FRONT
PANEL
3
SYMPHONIC
13
REAR
PANEL
4
PITCH
CHANGE
13
BASIC
OPERATIONS
5
PREEZE
14
PRESET
PROGRAM
SELECTION
5
REVERB
&
GATE
17
EDIT:
CHANGING
PARAMETERS
5
GATE
STORE:
SAVING
EDITED
PROGRAMS
6
ADR-NOISE
GATE
17
OUTPUT
BALANCE
AND
LEVEL
COMPRESSOR
18
ROGRAMMING
7
PAN
BYPASS
7
AUTO
PAN
19
UTILITY
FUNCTIONS
8
TRIGGERED
PAN
19
EDIT
TITLE
8
DELAY
VIBRATO
20
MIDI
FUNCTIONS
8
PARAMETRIC
EQ
20
FOOTSWITCH
MEMORY
RECALL
RANGE...
9
SAMPLE
APPLICATIONS
21
DESCRIPTION
OF
PROGRAMS
AND
SPECIFICATIONS
23
PARAMETERS
10
MIDI
DATA
FORMAT
24
REVERB
10
ROM
CONTENTS
AND
CONTROLABLE
ER1,
ER2
10
PARAMETERS
25
DELAY
11
EARLY
REFLECTION
MODE
CHART
26
ECHO
12
ROOM
SIZE
CHART
27
MODULATION
BLOCK
DIAGRAM
29
STEREO
FLANGE
12
DIMENSIONS
29
CHORUS
12
USER
PROGRAMMING
TABLE
30
STEREO
PHASING
13
MIDI
IMPLEMENTATION
CHART
31
1