Roland GR-77B User manual

2 nRoland
ШІН SASS GUITAR SYNTHESIZER
Gr-778
Owner's Manual

Ш PANEL DESCRIPTION
«Rear Paneb
G POWER ` Power Switch
!
9
r——
69MEMORY
CARTRIDGE
`
Memory
Cartridge
Holder
QGUITAR
INPUT
`
Guitar
Input
Connector
PROGRAMMER
:
Programmer
Connector
Өмір
OUT
`
MIDI
OUT
Connector
@MEMORY
PROTECT:
Memory
Protect
Switch
ӨРІТСН
`
Pitch
Control
Jack
ФУСЕ
:
VCF
Control
Jack
ET
die Roland SE.
Te Eë Н,
T 5 >
ЕТ ты. : Balanced Output Connectors
@LEVEL
`
Level
Selector
Switch
OUTPUT
`
Output
Jacks
@GUITAR
OUT
:
Guitar
Output
Jack
@AC INLET : Inlet
«Front Panel
@ Write Switch
@ Copy Switches
•
——sn
—
m
n
À
Ноій
Pedal
Switches
ГТ
—
——-
à)
Tune
Switch
ch
®
String
Selector
Switches
Ф String Mode Switches
(p Edit Switch
® Pitch Bend Switches
ФФ Displays
ШІ
|
| E e Number Pedals
(1 to 8)
*BBANK
:
Bank
Pedal
"САРТ
:
Cartridge
Pedal
WHOLO : Hold Pedal

IMPORTANT NOTES
Power Supply
The appropriate power supply for this unit is shown
onits name plate. Please make sure that the line vol-
tage in your country meets that.
Please do not use the same socket used for any
noise generating device (such as motor, variable
lighting system).
This unit might not work properly if turned on imme-
diately after turned off. If this happens, simply turn it
off and turn.it on again a few seconds later.
Before setting up the GR-778 with an external
amplifier or the Bass Guitar Controller, turn both of
them off.
This unit might get hot while operating, but there is
no need to worry about it.
Cleaning
* Use a soft cloth and clean only with a mild detergent.
e Do not use solvents such as paint thinner.
Location
* Operating the СА-778 near a neon or fluorescent
lamp may cause noise interference. If so, change
the angle or position of the GR-77B.
e Avoid using the GR-77B in excessive heat or humid-
ity or where it may be affected by direct sunlight ог ·
dust.
Repairing
* Savethe necessary data into a cartridge before hav-
ing the GR-77B repaired, in case it is accidentally
erased.
—
with поп-сегићед аг non-verified eq
RADIO AND TELEVISION INTERFERENCE
"Warning
-
This
equipment
has
been
verified
to
comply
with
the
knits
for
a
Class
8
computing
device,
pursuant
to
Subpart
J.
о!
Part
15,
of
ЕСС
Rules
Operation
pement 15 likely to resuit in interference to radio and TV reception.
The
equipment
described
іп
this
manual
generates
and
uses
radio-Irequency
energy
If
itis
not
instulled
and
used
property.
that
is,
in
strict
accordance
with
out
instructions,
it
may
cause
interference
with
radio
and
television
reception
This
equipment
has
been
tested
and
found
to
comply
with
the
limits
for
a
Class
B
computing
device
in
accordance
with
the
specifications
in
Subpart
J.
of
Part
15.
of
FCC
Rules.
These
rules
are
designed
to
provide
reasonable
protection
against
such
a
interference
in
a
residential
installation
However,
there
is
no
guarantee
that
the
interference
10
radio
or
television
reception,
which
can
be
determined
by
turning
the
equipment
0065
cause
interference
to
radio
or
television
reception,
which
can
be
determined
by
turning
the
equipment
on
and
aH,
the
user
is
encouraged
to
try
10
correct
the
interference
by
the
following
measure
Е
Disconnect
other
devices
and
their
input
output
cables
опе
at
3
time
И
the
interference
stops.
«t
їз
caused
by
either
the
other
device
ur
its
!
O
саше
These
devices
usually
require
Roland
designated
shielded
í
О
cables.
For
Rotang
devices,
you
can
obtain
the
proper
shielded
canie
from
your
dealer.
Far
non
Roland
devices.
contact
the
manufacturer
ог
dealer
for
assistance
if
your
equipment
does
cause
interference
to
radio
or
television
reception.
you
can
try
to
correct
the
interference
by
using
one
or
more
al
the
following
measures
H
Turn the TV or radio antenna unti the interferences stops
Move the equipment to one side ог the other of the TV or radio
Move the equipment larther away tram the TV or radio
Plug
the
equipment
into
an
outtet
that
is
ол
a
different
сисин
than
ine
TV
or
ramo
(That
is,
make
certain
the
equipment
ani
the
radia
ог
television
set
are
on
Circuits controlled by differant circuit needkers or fuses.)
Consider installing a rooftop television antenna wath coaxial cable lead in between the antenna ana TV
M
necessary,
you
should
consult
your
dealer
Or
an
experienced
radio
television
technician
far
additional
suggestions
You
m.
Брок! prepared by the Federal Commumcations Commission
“How to ideniify and Resolve Вано TY imterterence Proniems
This booklet is available from the US Government Prating Ole. Washington OC. 20:
as hid neptal the (оймен
2. Stock Мо 204 000 00345 4

CONNECTIONS
*
Before
making
or
breaking
connection,
be
sure
to
turn
ail
the
units
off.
* Setup with the Guitar Controiler
““НІЕЕНоіапа ~~ =
:
А о[ ______е if |
r TY
LM
1
C-24G
1. Guitar Input Connector Ө y
Connect
the
Bass
Guitar
Controller
here
by
using
the
supplied
cable
C-24G.
€ Using supplied cable C-24G
Push the side buttons of the socket, and without releas-
ing
them
insert
the
socket
into
the
connector.
Then
release
the
buttons,
and
the
socket
will
be
automaticaily
locked.
To
disconnect
the
socket,
press
the
side
but-
tons down and pull it out.
*
The
supplied
cable
C-24G
can
be
used
to
connect
any G-series Guitar Controller. Ө Guitar Input Connector
(C

* Setup with amplifiers, mixer etc.
To Monitor
2. Output Jacks ©
These jacks are used to connect amplifiers. When these
are the only output jacks used, mixed sound of direct
and synthesizer will be obtained. To fully benefit the
advantages of the GR-77B, use keyboard amplifiers and
Speakers, PA, or audio equipment. If two amplifiers are
used (stereo), chorus effect will sound more effective.
3. Level Selector Switch Ф
With this switch, select an appropriate output level
depending on the type of the amplifier you use. The
knack is to select the position that allows undistorted
sound of desirable level with the amplifier's volume set
to 5 to 7.
4. Guitar Output Jack @
This jack is provided to connect a bass amplifier.
Through this jack, only direct bass sound is sent ош.
Also, a preamplifier is built in here, therefore, good
result can be expected when an effect device or foot
volume is used. If both this jack and the Output Jack
are used at the same time, the pure synthesizer sound
is output through the Output Jack Ф
PA, Amplifier, etc. PA, Mixer, etc.
5. Balanced Output Connectors ®
These
are
used
for
setting
up
the
GR-778
with
the
bal-
anced
type
mixer
or
effect
device.
The
signal
sent
out
through
these
connectors
are
the
same
as
the
output
jacks
Ф,
but
the
maximum
output
level
is
OdB
regard-
less
of
the
position
of
the
Level
Selector
Switch
Ф.
If
setting
up
in
monaural,
be
sure
to
mix
the
signals
of
both
channels.
Also,
the
output
from
this
connectoris
transformless,
so
to
convert
it
into
unbalanced
output,
keep
the
2nd
pin
open.
©
©
€ Balanced Output Connector
5. Programmer Connector ©
Connect
the
programmer
PG-800
loptional)
here
by
using the 6P DIN Cord supplied with the PG-800
7. MIDI OUT Connector Ө
This
is
to
connect
а
MIDI
sound
module.
Use
the
оочопа! MIDI Sync Cable MSC-15, 25 or 50
6

e
8. Pitch Control Jack Ө and VCF Control Jack ©
By connecting the Foot Volume FV-200 (8055), you can
control the pitch and VCF Cutoff by depressing the
pedal.
" Use the Output Jack of the FV-200.
* Setthe Minimum Volume of the FV-200 to zero.
* Remove the spring holder from the FV-200. (Refer to
the operation manual of the FV-200 to see how to
remove it).
* When you are not using the FV-200, set the pedal to
its highest position.
9. Memory Cartridge Hoider €
Connect the supplied Memory Cartridge M-16C.
Set the Protect Switch on the cartridge to the ON posi-
tion, and insert the cartridge securely into the Memory
Cartridge Holder Ф of the GR-77B with the Protect
Switch of the cartridge facing upward. (See the picture
shown below.)
Connecting the Memory Cartridge
Connecting the Volume Pedal
7 ө
|
PEDAL
PITCH VCF
00000
Ғу-200
COUTFUT)
A A
vv
т a= алад Әй
ir
1
T
|
|
Protect Switch
~

PROBLEMS
CAUSED
BY
YOUR
IMPROPER
PLAYING
MANNER
The
GR-77B
digitally
processes
the
vibration
of
the
strings,
producing
digital
signal
that
controls
each
sec-
tion
of
the
synthesizer.
In
other
words,even
the
string
vibration
inaudible
in
usual
bass
guitar
performance
is
bound to be processed.
Therefore, you may be annoyed by unexpected reaction
of the bass guitar controller when playing it. The follow-
ing are possible symptoms and how to resolve them.
a. Sound Delay
The GR-778 reads the waveform of the string vibration,
and then detects the pitch by its computer. The lower
tone (slower vibration) needs more time for pitch detec-
tion, resulting in sound delay. The open 4th string (E)
requires at least 25ms (0.025 seconds). The sound
delay is also caused by a certain playing manner,
because the GR-778 is designed not to output sound
until the string vibration has become stable, to obtain
accurate pitch.
b. Sound cannot be muted
The 3rd and 4th strings are likely to keep vibrating even
when muted. So, when you play tremoio or repeat an
Open chord or muteless stroke on these strings, the
created
sounds
may
not
be
muted.
€.
Irrelevant
sound
is
heard
The
GR-77B
processes
even
the
string
vibration
irrele-
vant
for
deciding
pitch.
Therefore,you
need
a
special
care
for
picking.
d. No sound is heard
When
the
vibrating
time
of
string
is
too
short
or
the
pitch
is
ambiguous,
or
you
have
not
picked
or
touched
the
str-
ing
hard
enough,
pitch
detection
is
difficult.
Watch
that
your
picking
is
hard
enough.
*
Harmonics
playing
Avoid
playing
in
harmonics
manner,
if
possible.
The
problems
are
often
caused
by
feeble
string
vibration
in
harmonics manner

e
e
[4] OPERATION
1. GUITAR CONTROLLER
(2) Touch Plates
1) Balance Knob (3)
With
this
knob
turned
fully
counterclockwise,
only
direct
bass
sound
is
obtained.
As
you
rotate
it
clockwise,
syn-
thesizer
sound
will
be
increased
and
at
its
fully
clock-
wise
position,
only
synthesizer
sound
will
be
heard.
2) Master Volume (B)
This knob sets the overall volume.
3) Mode Switch ©
AtIposition Only direct bass sound is
obtained, and the Balance Knob (8)
does not work.
А апаш Both direct and synthesizer
position sounds are available.
4) Vibrato Knob @ and Touch Plats (€
By using these knobs, you can add vibrato effect.
1. When using the G-33 or G-88
Slightly turn the Vibrato Knob (S) and touch the Touch
Plate А while holding the strings down. To stop vibrato,
touch the Touch Plate 8 and .mmediately release it
© Mode Switch
@ Vibrato Knob
@ Edit Knob
( Master Volume
(£ Cutoff Frequency Knob
(2) Balance Knob
2.
When
using
the
G-77
Slightly
turn
the
Vibrato
Knob
@
and
touch
the
Touch
Plate
while
holding
the
strings
down.
To
stop
vibrato,
release
the
Touch
Plate.
If
the
Vibrato
Knob
(9)
is
set
to
zero,
no
vibrato
is
obtained
at
all.
That
is,
you
are
not
annoyed
by
unex-
pected
vibrato
effect
caused
by
touching
the
Touch
Plate
accidentally.
The
rate,delay
time
and
depth
of
the
vibrato
effect
change
according
to
its
set
level
in
writing.
5)
Cutoff
Frequency
Knob
(f)
6)
Edit
Knob
@
(Resonance
Knob
in
other
С
series)
These
knobs
work
exclusively
in
Edit
mode.
The
Cutoff
Frequency
Knob
@
is
provided
specif-
ically
for
controlling
the
VCF
Cutoff
Frequency.
The
Edit
(Resonance!
Knob
(9)
is
used
to
control
par-
ameters
other
than
the
cutoff
frequency
r to the owner's manual of
h bass guitar con-
tailer
for
the
other
contro!
knots

2. PLAY, EDIT & WRITE MODES
These Programs JIT | | E: ]
can be rewritten.
ETEA TIJ
4 |
— — eR
5
These Programs E
cannot be
"E FETA EIE TIE
Ж is a Program of Bank 3,
Patch Number 5.(3-5)
Set up 68-778 with amplifier and speaker, etc., and
power it up „and it will be ready to play. (= PLAY Mode)
There are 64 different tone colors preprogrammed (8
bank X 8 patch numbers) as shown left. And you can
recall any of those patches and edit it as you like.
(—EDIT Mode) This editing operation, however, dose
not autornatically rewrite the existing patch program.
if you wish to write the edited program, an appropriate
writing operation is required. Writing a new patch pro-
gram, however, replaces the one currently written. (=
WRITE Mode)
The 32 patches programmed in the bank 1 to 4 can be
rewritten, but the bank 5 to 8 are ail fixed programs.

3. PLAY MODE
a. Tone Color Selection
There are 64 different tone colors preprogrammed in
the GR-77B's memory (8 banks X 8 patch numbers) by
the manufacturer. When the GR-77B is switched on,
the Display windows show “ 5- ! “. 5-1 means that
tone color of bank number 5 (Display Ф), patch number
1 (Display 6) is called. The Display windows change as
а different tone color is called.
How
to
select
a
tone
color
1)
First
press
the
Bank
Pedal,
then
press
the
appropriate
Number
Pedal
(1
to
8)
that
corre-
sponds
to
the
Bank
number
of
the
tone
color
you want.
2)
Press
the
Number
Pedal
that
corresponds
to
the
Patch
number
of
the
tone
color.
|
[8]
Operation
Description
Power on!
Set Patch No.3
Set Patch No.8
Set Bank No.4
Set Bank No.5
&
Patch No.6
Patch
Program
“5-1”
is
initially
called.
Patch
Program
"5-3"
is
called.
Patch
Program
“5-8”
is
called.
Bank Number "5" flashes.
Patch
Program
"4-8"
is
called.
Bank Number "4" flashes.
Patch
Program
"5-8"
is
cailed.
Patch Program 5-87 is called.

b. Tone color selection when using
the Memory Cartridge
The supplied Memory Cartridge M-16C can expand the
memory capacity by another 32 patch programs.
Memory Cartridge Mode
OPERATION
1)
Change
the
Internal
Memory
mode
to
the
car-
tridge
mode
by
pressing
the
Cartridge
Pedal
®.
Each
time
you
press
the
Cartridge
Pedal
@,
the
Internal
Memory
and
the
Cartridge
Memory
modes
are
alternately
selected.
When
it
is
the
Cartridge
mode,”
С
the
Display
Ф.
2)
Selecta
tone
color
in
exectly
the
same
way
as
“ is shown at the left of
in the Internal Memory mode, but note that the
Bank 5 to 8 are not available.
*
When
the
internal
Memory
mode
is
changed
to
the
Cartridge
mode
in
the
step
1),
the
numbers
in
the
Display windows will flash.
The previous tone color remains until you select a
tone color in the step 2).
NOTE
The memory capacity of the Cartridge is 32 tone colors.
That
is,
while
in
the
Cartridge
memory
mode
(the
Dis-
play
shows
"
С
`),
the
available
tone
colors
are
32
in
the
Banks
1
to
4.
If
you
try
to
select
the
irrelevant
Bank
numbers
5108
(if
pressing
the
Bank
Pedal
and
the
Num-
ber Pedal 5 to 8), "C " will change to " Er c - and
returned
to
the
previous
display.
!f
this
happens,
select
the tone color in an appropriate bank 1 to & Until you
select a new tone color, the previous one remains.
APPLICATION
It is possible to use the Memory Cartridge that stores
the tone colors synthesized on the JX-8P Roland poly-
phonic synthesizer. Take the following operation.
OPERATION
@ Insert the Memory Cartridge of the JX-8P to
the Memory Cartridge Holder Ө on the GR-77B.
ә
Set the Protect Switch on the Memory Car-
tridge to the OFF position.
$i Press the Cartridge Pedal ©, make sure that
“ Ü "isshown at the left of the Display win-
dow €, and set the Protect Switch to the ON
position.
e
Change the tone colors in the same way as
show in "Memory Cartridge Mode" steps 1)
and 2).
*
The JX-8P's Memory Cartridge used for the GR-77B
will work properly on the JX-8P.

с. Other Useful Functions
Ф String Mode
Switches
® Pitch Bend Switches
E [5]
-STRING MODE
|
i PITCH BEND |
i COPY | HOLD PEDAL `
STRING SELECT j |
Ф Hold Pedal
5 Switches
The
switches
®, D,
and
on
the
front
panel
are
On/
Off
switches
which
can
add
extra
effects
such
as
pitch
Bend
and
Hold
on
the
strings
you
choose.
Gently
push
the
switch,
and
it
will
be
alternately
turned
on
and
off.
When
the
switch
is
turned
on,
the
indicator
lights
up.
1) Pitch Bend Switches ©
When the Foot Volume is used to control the pitch, this
sets how the pitch changes by pressing the pedal.
When the UP switch is on, the pitch goes up, and when
the
DOWN
Switch
is
on,
the
pitch
comes
down.
2) Hold Pedal Switches @
Hold Pedal à
Press
the
Hold
Pedal
@
and
the
Display
Ф
will
show
"A “and the sound currently in use will be sustained.
This
is
called
Hold
effect.
The
Hold
Pedal
Switches
Ф
can
be
used
to
select
either
of
the
Hold
modes;
Latch
or
Uniatch.
Latch
Mode
:
Pressing
the
Hold
Pedal
once
will
turn
the
Hold
effect
on,
and
it
will
not
be
turned
off
until
the
pedal
is
pressed
again.
Unlatch
Mode:
The
Hoid
effectis
on
as
long
as
the
Hold
Реда!
is
pressed.
and
releasing
the pedal turzs it off
E
єє
auem
|
|
Ф String Selector
Switches
*
This
Hold
effect
cannot
be
obtained
if
Hold
is
not
set
in
the
String
Selecting
operation
which
is
refered
to
later on this page.
In
the
Memory
Cartridge
mode
(=
the
Display
Ф
show”
Ü
`)
pressing
the
Hold
Pedal
will
cause
the
same
Display
to
show
*
С
*
and“
H
"alter
nately.
3)
String
Mode
Switches
String
Selector
Switches
Use
these
switches
to
select
which
of
the
string(s)
should
take
on
the
Voice
or
the
Hold
effect.
The
String
Selector
Switches
1
to
4
correspond
to
the
gui-
tar's
ist
to
4th
strings.
VOICE
`
Depress
the
Voice
Switch,
then
select
the
string(s)
which
should
take
the
synthesizer
voice
by
pressing
the
Corresponding
String
Selector
Switch(es)
Ф.
HOLD:
Oepress
the
Hold
switch,
then
select
the
str-
ingís)
on
which
the
Hold
effect
should
work.
e
Јо
or
Down
mode
of
the
Pitch
Bend
effect,
the
n
cr
Unlatch
mode
of
the
Hold
effect
and
the
e
5штгс
Select
data
can
be
individually
set
for
each

4. EDIT MODE
Like any usuai synthesizer, the GR-77B has various par-
ameters (44 kinds) which can be edited for sound syn-
thesis. The GR-77B, however, does not feature knobs
or switches on its panel for you to touch or move.
Instead, there are two methods of synthesizing. One is
using the optional programmer PG-800 which works
just like panel controls of a usual synthesizer. Another is
calling each parameter by using the Pedal Switches and
changing its value by using the controls on the Guitar
Controller. For quicker and easier editing or synthesis
from scratch, the PG-800 may be essential.
* This Editing function does not automatically rewrite
the existing program, unless the appropriate proce-
dure for rewriting (see page 24 ) is done.
a. Editing with PG-800
The optional programmer PG-800 can considerably sim-
plify the editing operation. The PG-800 works like the
control panel of a usual synthesizer, that is, you can edit
the existíng patch program or make a complete new
patch from scratch, by actually using the tangible knobs
and buttons.
* For hock-up, use the 6 pin DIN cable (2.5m) of the
PG-800.
The Programmer PG-800 functions when the GR-
77В is in the Play or Edit mode.
1) Play Mode
In this mode, the tone color currently called can be
edited by moving the knobs on the programmer. While
in editing, a dot will flash at the right end of the Display
®.
2) Edit Mode
In this mode, the parameter's value can be seen in the
Display.
OPERATION
T
Select
the
tone
color
you
wish
to
edit
by
using
the
Bank
Pedal
Ф
and
the
Number
Pedal
Ф.
о
Push the | PARAM| in the Edit Switches Ф to
turn the GR-77B to the Edit mode.
*
The
Display
©
and
®
show”
CF.
x
x^"
C£"
represents cutoff frequency, and” x x ” is its value.
3 Edit the tone color by moving the knobs on the
programmer.
The Disciay will show the corresponding parameter
number and its value

@ Ifyou like, continue to adjust other parameters
ж
See
“с.
Parameter
Table"
on
page
18
and
the
att-
by
moving
the
knobs
or
the
slider
switches
on
ached
Edit
Мар
to
learn
the
name
and
number
of
the
programmer.
each
parameter,
its
function,
how
it
is
shown
in
the
display
windows
and
how
it
is
related
to
the
knob
or
the slider switch on the Programmer.
3)
Manual
Mode
"
While
editing
a
parameter
with
the
PG-800,
even
if
the
current
set
positions
of
the
knobs
or
switches
are
Pressing
the
Manual
Button
on
the
PG-800
will
turn
the
exactly
what
you
desire,
change
the
position
once
GR-77B
to
the
Programmer
mode.
The
Display
Window
then
return
it.
Otherwise,
the
parameter
data
might
Ф
shows
`
H”.
In
this
mode,
the
whole
panel
setting
not
be
affected
by
the
PG-800
at
all,
thereby
remain
of the PG-800 decides the tone color. That is, now, unchanged.
existing patch program in memory has nothing to do
with
your
sound
synthesis,
You
make
a
new
patch
from
`
The
edited
patch
program,
either
with
the
guitar
con-
Scratch.
This
mode
is
cancelled
when
you
select
any
troller
or
with
the
PG-800,
cannot
be
retained
unless
е
other
patch
program,
or
a
new
program
is
written.
a
proper
writing
procedure
is
taken.
Q Programmer Connector
Data Display and Value Setting
Programmer Data Display
Knob Knob ote
ri Г OO
É
И
LI
5
LI
zd
Sider senten Switch Position
(more than 3
i Programmer positions)
| PG-800 2!
I П Ш N
I
m
|
ш
1
1
1
1|
|
|
t
ШІНШІ
ES
il
|
i
|
Slider
Switch.
į
Switch
Position
| (two positions) | 1 П |
© |
Im

b. Editing Without PG-800
It is even possible to edit the parameters without using
the programmer. There are altogether 44 parameters,
and each parameter has a number. Call the parameter
you wish to edit by assigning the appropriate number
with the Number Pedal &
* See “с. Parameter Table" on page 18 and the
attached Edit Map to learn the name and number of
each parameter, its function, how it is shown in the
Display windows and how it is related to the knobs
or the slider switches on the Programmer.
OPERATION
© Callthetonecoloryou wish to edit by using the
Bank Pedal @ and the Number Pedal Ф.
% Pushthe |PARAM| of the Edit Switches @ to
turn the GR-77B to the Edit mode.
* The Display Ф and 8 show" CF хх“. "CF ^
represents cutoff frequency, апа“ x x "is its value.
Now, rotating the Cutoff Frequency knob on the guitar
controller will change the value of the cutoff frequency,
therefore alter the tone color, and cause the value
shown in the Display to change. If you do not wish to
change the value of the cutoff frequency, skip this oper-
ation and go directly to the step @.
Y Assign the number (2 figures) of the parameter
you wish to edit by pressing the relevant Num-
ber Pedal ®. The first pressing will change the
left figure, then the Display Window Ф show а
flashing Баг” — " on the right asking you to set
the right figure. The Display Window Ф shows
the data value of the parameter.
©
While
actually
listening
to
the
sound,
adjust
the
parameter
by
using
the
Edit
(Resonance)
Knob.
8
By
repeating
procedure
3
and
2,
keep
on
syn-
thesizing.
[NOTE]
When any slight editing is done, a dot flashes in the
Display 6 indicating that the tone color currently in use
is different from the one in memory. This indication
helps
you
to
understand
that
the
edited
tone
color
is
not
yet
written
into
memory.
If
you
wish
to
write
the
edited
tone
color,
take
an
appropriate
writing
procedure.
If
you
do
not
want
to
retain
the
edited
tone
color,
simply
call
any
other
patch
program.
(Just
note
that
calling
а
patch
program
can
be
done
only
in
the
Play
mode.)
To
turn
the
GR-77B
to
Play
mode,
simply
press
the
[PARAM] of the Edit Switches Ф

Data Display and Setting a Value
Data
Display
|
Value
Setting
i
Knob
n
—
|
0
~
5
~
10
|
58
5
10
33
|
|
|
|
N
|
| en | 1 |
|
Séi
L
~
|
ла“
о
|
-
LI
!
UU
gor
|
|
(RESONANCE)
*
|
|
Switch
Position
|
ш
|
| I D üt ү ü
Qu
i
H
|
i ft ~
| ЖҰЛА E pup ` |
| EDIT [
Switch position u
I
@
EDIT
(RES)*
(
}*:When
using
the
controller
other
than
the
G-77.
Parameter
Number
Data
e.g.: Cutoff Frequency
4
This
dot
flashes
during
editing.
Call
the
parameter
38
(MIXER,
ENV)
ті
ГІ
)
The
"ight
window
shows
that
_!
Lt
]
1)
1
the
Side
Switch
is
set
to
1
“ГЕ”
goes
out
and
“
—
"
flashes.

c. PARAMETER TABLE
DCO (Digitally Controlled Oscillator)
DCO is the Digitally Controlled Oscillator that controls
the pitch and generates the waveforms that are the
sound source of the synthesizers. Owing to its digitally
control system, this offers superior pitch stability com-
pared to the VCO (Voltage Controlled Oscillator). The
GR-778 has 2 DCO's.
Functi
M
Display
|
Parameter
unction
|
grammer
а
Data
Value
|
|
This
is
to
change
the
pitch
range
of
the
ОСО
in
exact
DCO-
1
I6
EN
DCO-1
Range
one
octave
steps
from
2'
to
16'
(2',4',8',16').
|
гі
i
8`
is
standard.
i
D
If
Í
iM
|
III)
KS
NOU
EIS
|
8
T
|
|
A
DCO-
2
4
|
2
|
DC0-2
Range
|
-
|
i
|
|
L.
1771)
|
іші
This
is
to
choose
the
output
waveform
of
the
ОСО.
DCO-
I
Noise
|
Square
DCO-1
Waveform
31,
jos
xd
sedem
Ж.
(Saw
Tooth)
x:
L
!
С
1111
|
1171
\
Л
(Pulse
Wave)
RÄ
DCO-2
Pulse
|
Sawtooth
DCO-2
Waveform
|
[LI
(Square
Wave)
чыз
k
wee
NI
==
AW
(Noise)
mec
nri
`
This
changes
the
frequency
(pitch)
of
the
DCO,
in
semi-
DCO-
!
DCO-1
Tune
tone
steps.
i=
ә
Variable
Range:
+12
(+1
Octave)
)
5
I
l
|
«ост, «лост
рсо-
2
DCO-2
Tune
=
LI
|
"ч
Ca)
When
the
LFO
output
is
modulating
the
ОСО,
this
par-
"
DCO-
1
H
|
I
|
DCO-1
LFO
Depth
ameter
is
used
to
adjust
the
depth
of
the
modulation.
1
Li
deg
For
vibrato
effect,
select”
(N,
“withthe
LFO
Wave-
I
I
WG
D
KEE
ue
form.
*
{
DCO-2
DCO-2
LFO
Depth
.
at:
rri
CO
2
DCO-1
When
the
ENV
output
is
modulating
the
DCO,
this
par-
|
и
DCO-
1
Envelope
Depth
|
ameter
is
used
to
adjust
the
depth
of
the
modulation.
|,
!
г
|
|
I
|
|
Y
[recepisse
aes
|
E
|
!
DCO-2
|
i
;
|
ps
2
|
Envelope
Depth
|
|
r
4

: The pitch is determined by DCO-1, and the har-
monic
contents
by
DCO-2.
The
waveform
is
deter-
i
|
mined
by
the
DCO-2's
synchronization
to
DCO-3.
|
i
|
|
i
i
i
!
i
i
|
|
a
haad
j
š
i
e
1
111
|
CROSS
2
:
Both
1
and
3
work
together.
|
t
ч
ті
|
|
i
“|
d
|
;
Н Н
аш
ME
L
2
I
|
Modulation
3
:
DCO-1
and
DCO-2
affect
each
other,
pitch,
ћаг-
|
{
2
i
3
|
monic
contents,
and
waveform.
|
|
|
|
|
|
|
|
i
OFF
:
The
pitch
and
waveform
of
DCO-1
is
independ-
! i
1
ent
of
that
of
DCO-2.
|
|
|
1111
|
1111
DCO-2
The
frequency
(pitch)
of
the
DCO-2
can
be
adjusted
|
"тө
7
r
nn
|
2
|
slightly
with
this
parameter.
i
”
=“
(
i
FineTune
|
:
|
L.
|
=
|
|
*
Variable
range...
50
cent
|
МЕМ
o
Еј
|
|
|
|
|
i
|
|
When
the
DCO's
pitch
is
controlled
by
the
ENV,
and
|
OFF
|
the
amount
of
the
ENV
is
controlled
by
Dynamics,
this
|
|
j
!
DCO
parameter
adjusts
the
sensitivity
of
the
picking.
(See
|
a
“1
I
1111
1111
Dynamics
Range
|
Note
1
below.)
E
=
š
А
i
|
|
11
!
|
1111
|
1111
H
This
selects
the
polarity
of
the
Envelope
curve.
Nor-
ENV2
ЕМУ?
|
mally,
f
isused.in
МУ
mode,ADSR
pattern
a
kai
~
ЭМ
‘ |
!
1
DCO
|
will
be
all
inverted.
|
c]
E
=
=
1111
1111
Envelope
Mode
Evi
Лх
|
Ет
ри
ENV1
V
|
ЕМУ
1
|
ENVI
ENV2
~
|
|
y
|
ds
,
ENV2
`X
|
|
газа
|
111]
uongiaiy 10105 ачор
Note 1
Depending оп the position of the Dynamics
Range Selector, the tone color alteration differs
as shown below.
E
Intensity of picking

MIXER
This
is
where
the
volume
baiance
of
the
DCO-1
and
DCO-2
is
controlled.
P
|
Function
Programmer
Display
a
r
|
uncti
|
|
n
i
гатеїе
|
ie
|
Number
|
Data
Value
:
|
This
adjusts
the
level
of
DCO-1.
i
;
DCO-1
Level
i
|
|
|
i
This
adjusts
the
level
of
DCO-2.
:
|
DCO-2
Level
|
š
DC0-2
|
When
ENV
controls
the
DCO-2's
level,
this
sets
the
Envelope
Depth
!
amount
of
ENV
signal.
|
DCO-2
`
When
the
DCO-2's
level
is
controlled
by
ENV
Depth
:
ones
|
E
|
and
then
by
Dynamics,
this
sets
the
sensitivity
of
the
|
M
I
Dynamic
Range
|
E
i
|
picking.
(See
Note
1
on
page
19.)
|
|
`
Normally,
f
isused,
andin
X
mode,
ADSR
|
pattern
will
be
inverted.
:
uS
|
DCO2
|
P
Eg
|
i
ENV
1
]
|
Envelope
Mode
м
|
|
ENVI
V
|
!
ENV2
N
|
|
|
ему2
№
МСЕ (Voltage Controlled Filter)
Theoutput signal of DCO goes to the Mixer, then to the
VCF to be filtered. Each VCF lets lower frequency har-
monics pass and cuts off the higher ones. In other
words, it is a usual low pass filter. By controlling the
cutoff point and resonance, the waveform changes,
thereby the tone color alters.
| 5 | Displa |
i Parameter | Function i Programmer маз еШ i
| ; | Number | Data Value |
The HPF (High-Pass Filter) is a filter that passes higher | 1 0 | roll
H |
Cutoff
Frequency
you
increase
the
value,
cutoff
point
gces
up,
lower
fre-
ber
2)
3
ГЕ
High-pass
Filter
frequency
harmonics
and
cuts
off
the
lower
ones.
As
"
КЕН
Peed
baa
M
о
ка
(III
7711)
quency harmonics being cut off.
T
fare
йен
of
the
YCF.
As
you
КИЕ
This
is
for
changing
the
cutoff
point
of
ine
VCF.
As
уси
ame
ri
ri
decrease
the
value,
higher
frequency
harmenics
will
D
LH
i
be
cut
off.
and
the
waveicrm
gradually
becomes
і
{
"1
m
Cutoff
Frequency
M
š
a
—'
approximation
of
з
sine
wave,
then
tre
scund
wii
аде
Ha
out
rii!
=
JA
20