Yamaha REV-1 User manual

YAMAHA
DIGITAL
REVERBERATOR
REV-1
REMOTE
CONTROL
UNIT
RCR-1
OPERATING MANUAL

ABSTRACT
The REV-] is a professional digital reverberator with 1 input and 2 outputs.
Various reverber-
ation effects can be added to original sounds by allowing early reflectoins and subsequent re-
verberation to be independently controlled and mixed together.
The REV-] is a highly refined
system which offers superb performance and is well suited for use in halls, recording studios,
broadcasting, and for sound reinforcement applications..
FEATURES
À Professional Digital Reverberator with
Excellent Performance
The REV-] is a digital reverb unit which meets
all requirements for use in halls, recording
studios, and broadcasting stations.
The frequency response is from 20 Hz to 18 kHz,
distortion is below 0.0396, and the dynamic
range is 85 dB in reverb mode.
Independent Control of Early Reflections and
Subsequent Reverberation
YAMAHA's proprietary large scale integration
(LSI) chips for signal processing, and a micro
computer, allow subsequent reverberation of
high quality, and up to 40 early reflections
(L, R each) to be independently controlled
and programmed. Also, use of the remote con-
trol unit enables user control over elements
such as sound directly from the source, early
reflections bouncing off surfaces, as well as
subsequent reverberation, in which the reflec-
tions are multiplied, to be perfectly con-
trolled. Thus, the delicate natural acoustic
properties of concert halls can be accurately
simulated.
The following can be controlled with the re-
mote control unit:
: Early Reflections
Any one of eight different early reflection
modes can be selected. Initial delay can be
set up to 600 msec. in steps of 1 msec.
Accurate simulation of the natural acoustic
properties of virtually any environment is
made possible through the free control of
settings for: room size (volume of room), the
number of early reflections, an acoustic
absorption coefficient of walls.
* Subsequent Reverberations
Any one of eight different subsequent rever-
beration modes can be selected. The delay time
between direct sound and subsequent reverber-
ation can be set up to 600 msec. in steps of
1 msec. Reverberation time can be selected
from 0.1 sec. up to 99.9 sec. at the mid-low
frequency band. Also, reverberation time can
be adjusted differently in each of the four
frequency bands (high, mid-high, mid-low, and
low).
Main unit (ROM = 30, RAM - 60),
Remote control unit (RAM -
99 Memories
The unit makes available 30 pre-set memories.
They include such settings as: “LARGE HALL”,
“HAND CLAP”, "PERCUSSION PLATE", and "CHORUS".
In addition, the user can store modifications
of these pre-set programs, or his own program,
in any of the 69 user-programmable memories.
Numeric Data Entry
The user can enter data easily with the ten
numeric buttons on the main unit, a ten-key
numeric pad on the remote control unit, and
the "UP" and "DOWN" keys and buttons.
The data being entered can be monitored on 3-
digit, 7-segment LEDs on the main and remote
control units, as well as a liquid crystal
display (LCD), on the remote control unit.
Input Level with 16 Step LEDs
This assures a precise level setting and a
wide dynamic range. On the front panel of
the main unit, the input can be monitored, as
well as on the remote control unit, with
which both input and output can be monitored.

— T xH .. .. €
Specialized Remote Control Unit
Use of the remote control unit enables the
following three elements to be perfectly
controlled: direct sound; early reflections;
and subsequent reverberation. By varying the
settings for these three elements, the natural
acoustic properties of concert halls can be
accurately simulated. In addition, the remote
control unit is equipped with a lighted 64x
240 dot matrix liquid crystal display (LCD).
Any one of eight different graphical display
modes for such values as reverb waveforms (W/
F) or reverb time (R/T) can be chosen to aid
in the setting of data. Reverb time has two
different displays: Delay ] and Delay 2; and
there are displays for the low and high pass
filters.
Computer Connector and Other Extension
Terminals
The РЕУ-1 is equipped with a terminal which
enables computer control (RS-232C compatible),
a terminal for an external word clock, and
there is an optional terminal for digital 1/0.
19 Inch Standard Rack Mount

BENE
IS
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NM
MM
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с
—————
TABLE
OF
CONTENTS
INTRODUCTION
(Please
read
before
use)
------
4
SPECIFICATIONS
8
5
FRONT
PANEL
CONTROLS
uuu
7
REAR
PANEL
qata
9
APPLICATION
M
10
MEMORY
LIST
----------------езее-е
ее
П
REMOTE
CONTROL
UNIT
c
12
BASIC
OPERATION
FRONT
PANEL
OPERATION
c
22
REMOTE CONTROL UNIT OPERATION ---------- 24
REMOTE
CONTROL
DISPLAYS
c
32
REV-1
UNIT
LAYOUT
==
34
RCR-1
DISASSEMBLY
------З------Ә---------
34
DIAGNOSTICS
PROGRAMS--——-—-—-——
ее
35
MAINTENANCE
----əЗ------------е---е-ее
еее
36
KEYS
FOR
SPECIAL
MEMORIES
-----------------------------
37
APPENDIX
c
39

INTRODUCTION (Please read before use)
Voltage
U.S.Version ----------- AC110V~120V
General Version ---- AC220V~240V
Heat Dispersion
In order to avoid heat build up, the unit is equipped with a heat dispersion fan for forced air
cooling. The air current caused by the fan travels from the left to the right, so be sure to
allow enough space on either side for proper circulation (not less than 50 mm).
l
ИШҮ
ШИШ
|
IH
UU
<——
Air flow
Environmental Temperature
Do not expose this unit to excessive heat. Operating temperature range is between 0 and 40'
centigrade (32° and 95° F).
Remote Control Unit Connection
Power to the remote control unit is supplied from the main unit. Do not disconnect the connec-
tor while the power of the main unit is on.
Stay for Circuit Boards During Transportation
After unpacking the unit, remove the stay which is inside the main unit and holds its 4 circuit
boards. This stay prevents the circuit boards from coming out accidentally during transporta-
tion
and
it
must
be
removed
before
mounting
on
the
rack
or
it
will
not
be
possible
to
remove
the
circuit boards later.
Removal: Remove the two screws on the front panel, and pull down the front panel towards you.
Next, remove the four screws holding the top and bottom covers; these covers hold the
stay.
Finally,
pull
the
stay
out
towards
you
(see
section
on
“REV-1
UNIT
LAYOUT"
p.34).
Do
not
throw
the
stay
out,
it
can
be
used
to
secure
the
circuit
boards
when
the
unit
is
transported
again.
External Cleaning
Do not clean the unit with such volatile substances as benzine or paint thinner. Remove dirt
and dust with a dry, soft cloth. Internal cleaning should be left to a qualified technician.

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a
L
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шышы
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——
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SPECIFICATIONS
Ш Sound Output Modes
The REV-1 has three output modes:
a) Direct Sound
b) Early Reflections
c) Reverberation
Ш Programs
[Input Filters
@ Low Pass Filter сзсз 4,6,8, 10kHz
Q High Pass Filter -------- 50, 100, 200, 400Hz
Early Reflections (E/R)
@ Maximum (L and R) ·---------------- 40 each
Q Initial Delay (Delay D
fpe qune O to 600msec
Early Reflection Time -------- 0 to 370msec
E/R Modes (8 types)
@ ROOM © HALL-S @ HALL-M
@
HALL-L
©
RANDOM
©
REVERSE
@ PLATE SPRING
Room Size (8 steps)
x1/8, x1/4, X1/2, X1, X2, X4, X6,
and х8
E/R Number (8 steps)
1, 2. 4, 8, 16, 24, 32, 40
Liveness (8 steps)
1. 2, 3, 4, 5, 6, T, 8
dead --: += —live
Reverberations (REV)
Initial Delay (Delay 2)
ынты 0 to 600 msec
Reverberation Time ---------: 0.1 to 99.9 sec
Reverberation Modes (8 Types)
(D Super High Density
@ High Density/High Initial Diffusion
@ High Density/Low Initial Diffusion
(D Medium Density
(5 Medium Low Density
(6 Low Density
(0 Super Low Density
Equally Spaced Diffusion
Reverberation Time can be set independently
in Four Frequency Bands
Low (11 steps, standard-Mid-Low range)
х0,4, X0.6, х0.8, х1.0, X 1.2, X 1.4,
x1.6, х1.8, X2.0, X2.2, and X2.4
Mid-Low-Standard Reverberation Time
Mid-High (11 steps, standard-Mid-Low range)
x0.2, х0.3, х0.4, х0.5, х0.6, x0.7,
x0.8,
x0.9,
x1.0,
х1.1,
and
x1.2
High (11 steps, standard-Mid-Low range)
-5, -4, -3, -2, -1, 0, +], +2, +3, +4,
and +5
Crossover Frequencies
Low/Mid-Low ccc 125, 250, 50082
Mid-Low/Mid-High 7-7 1,2,4 kHz

B Main Unit
(input)
Number of Input Channels ------------------- 1
Circuit ----------- Electronically Balanced
Input Impedance -- greater than or equal
to 10 kohms
Nominal input level -------------------- 14dB
(Headroom --------------------------------- 14dB)
Maximum Input Level ------------------- +20dB
Connector “--------------------------- XLR- 3-31
(Output)
Number of Output Channels
essent 2 (L and B)
Circuit “ress Electronically Balanced
Output Impedance -------- 600 ohms or less
Connector «trees XLR- 3-32
Nominal output level -------------------- +4dB
Maximum output level -------------------- +18dB
Frequency Response
—
20Hz
to
18kHz
+/-1dB
Harmonic Distortion (in Delay Mode)
ej less than or equal to 0.0396
@lkHz during maximum output
Ш Remote Control Unit
Liquid Crystal Display (LCD) Modes
W/F - Wave Form
F/C - Filter and Crossover
R/T - Reverberation Time
RATIO - Reverberation Time Ratio
E/R - Early Reflection Mode
REV - Reverb Mode
P/S = Preset Titles
M = Memory Titles
Memory
RAM (01599) eerte 9 sets
Environmental Temperature
ORO
0
to
40°C
(32°
to
95°
P)
Power Requirements (Supplied Through
Cable From Main Unit) ----------- DC+/-12V
Power Consumption ------------------------ 15W
ТЕРІ рингер сен кімнен 1.8kg (4 lbs.)
Dimensions (WXHXxD)x
ROSAS 1-3/8” x 1-3/4” x 11-3/8”
Dynamic Range (186mm x 45mm x 289mm)
].Reverberation Mode -------------------- 85dB
2.Echo Mode --------------------------------- 85dB Remote Control Cable Length
3.Delay Mode ·------------------------------- OB .- e 10m (33 ft.)
Sampling Frequency --------------- 44. 1kHz * Measurements exclude feet, knobs,
connectors, and other protuberances.
Number of Quantization Bits -------------- 16
Memory * А11 specifications subject to change
ROM (1930) sores ena dese etim 30 sets without notice.
RAM (31490) eee 60 sets
The memory (RAM) is backed up after
cutting power with Ni-Cd batteries.
Environmental Temperature
UNDER
0
to
40°C
(32
to
95°
P)
Power Requirements
U.S. Мегѕіоп--------------------- AC110V—120V
General Version --------------- AC220V~240V
Power Consumption --------------------------- 150W
Weight >------------<--------------- 10ке (22 Ibs.)
Dimensions (WXHxD)x
Бо ag oes 18-7/8” x 5-1/4” x 14-5/8”
(480mm x 133mm x 372mm)
* Measurements exclude feet, knobs,
connectors, and other protuberances.

FRONT
PANEL
CONTROLS
©
ө 6
00
(D Power Switch
@ Monitor Volume Level Knob
This
knob
adjusts
the
level
of
the
signal
fed
to
the
headphone
amp.
(9 Headphone Jack
Stereo headphone jack for monitoring, for use
with
standard
stereo
headphones
with
an
imped-
ance of 8 ohms or more.
(D Power Lamp (red)
(5) REMOTE Indicator
When this indicator is on, the user can oper-
ate the remote control unit instead of the
controls on the front panel of the main unit.
This indicator is turned on or off with the
“REMOTE” button.
©
Function
Indicators-R/T,
DELAY1,
MEMORY
The function which is under selection with
the function buttons in the upper right hand
corner of the panel is indicated with these.
(0 Input Level Meter
Input level (from O to -60 dB) is divided into
16 levels (LEDs).
Green -60 to -18 dB
Orange -15 to -3 dB
Red clipping level
The lowest level orange LED (-14dB) is the
nominal level.
-4
09
REVERB TIME Display
This
3-digit
LED
indicator
displays
the
rever-
beration
time,
at
the
mid-low
frequency
band
(around
500
to
1,000
Hz).
Reverberation
time
can
be
selected
up
to
99.9
sec.
in
steps
of
0.1
sec.
(9 E/R DELAY (initial Delay) Display
This 3-digit LED indicator displays the delay
time between the direct sound and early re-
flections. It can be selected up to 600 ms in
steps of 1 msec. When this delay changes,
delay 2 (the time between direct and subse-
quent reverberations) will also change by the
same amount.
dà MEMORY (Memory Number) Display
This
2-digit
LED
indicator
displays
the
number
of
any
of
the
90
memories
(ROM
or
RAM).
Memories
1
to
30
are
preset,
read
only
memo-
ries
(ROM).
Тһе
data
they
contain
can
be
read
and
set
at
will.
Memories
3]
to
90
are
user-
programmable
random
access
memories
(RAM),
and
therefore
can
not
only
be
read,
but
also
set
by
the
operator
as
desired.
(D Numeric Buttons (incl. 10 digits and
decimal point)
These buttons are used to change the values of
each function (“REVERB TIME, DELAY 1, MEMORY").
The user can enter data while monitoring the
display of the specified function. They can
also
be
used
to
clear
the
value
of
a
specified
function on display, or modify the value or
when incorrect data must be corrected (see (0
"ENTER Button").

@ CLEAR Button
Used to clear the value of a specified func-
tion on display. Used when data must be modi-
fied or to correct mistaken data.
43 UP and DOWN Buttons
Used to increase or decrease the value of a
specified function. They are convenient in
setting the level to an optimum while monitor-
ing.
@ ENTER Button
Press this key to enter data from the numeric
buttons. Data will not be entered if this
button is not pressed before the function is
changed with a function button.
d$ FUNCTION Buttons
R/T (Reverb Time) Function Button
Press this button, and the “R/T” function
indicator to the left of the input level meter
will light. Reverberation time can now be
changed. Monitoring the change of the “REVERB
TIME" display to the right of the input level
meter, the reverberation time value can be
changed with either the ten numeric buttons,
or the "UP" and "DOWN" buttons.
DELAY 1 (E/R Delay 1) Function Button
Press this button, and the DELAY ] function
indicator to the left of the input level meter
will light. Early reflection delay data can
now be input or altered. Monitoring the
change of the "DELAY 1” display to the right
of the input level meter, the Delay 1 time
value can be changed with either the ten
numeric buttons, or the "UP" and "DOWN"
buttons. Do not forget to press the “ENTER”
button last of all if you wish to enter a new
delay time.
“Delay 2" data can be displayed on the “DELAY
1” display by recalling the “DELAY” of memory
number 19. To do this, first press the “DELAY
1” function button, and then numeric button
“2” and press the “DELAY 1” button again.
Memory Function Button
Press this button, and the “MEMORY” function
indicator to the left of the input level meter
will light. The memory number can now be
. changed. Monitoring the change of the “MEMORY”
display to the right of the input level meter,
the memory number can be changed with either
the ten numeric buttons. Press the "STORE"
button to write in the memory, or the "RECALL"
button to read data from the memory.
10 Memory Buttons
STORE (Write) Button
Used to write data into a memory. Press the
"MEMORY" function button, specify the memory
to be written in with the ten numeric buttons
(RAM memories are numbers 31 to 90), and then
press this button.
RECALL (Read) Button
Used to read data from a memory. Press the
"MEMORY" function button, specify the memory
to be recalled in with the ten numeric buttons
(both ROM and RAM memories, numbers 1 to 90,
can be used), and then press this button to
read the data.
(2 REMOTE Button
Press this button to change to remote control
operation. When it is pressed, the “REMOTE”
display to the left of the input level meter
will light up, meaning that operation is now
possible with the remote control unit.
Press it again, and the display will turn off,
Signaling that operation has returned to the
front panel controls.
0% INPUT LEVEL Control
At 0, input gain will become 1 (nominal), and
the output level will be the nominal output
level. At this time, with a standard of +4dB,
the head room margin becomes +14 dB.

REAR PANEL
(D INPUT (Input XLR Connector)
The balanced XLR (pin l-ground; pin 2-hot;
pin 3-cold) level is +4dB nominal, and head-
room is +144В, with a maximum input level of
+20dB, input impedance not less than 10 kohms.
@ REM/COMP (Remote Control/Computer Switch)
Switch to “REM” to use the remote control unit,
and to “COMP” to use a computer via the RS-
232C cable.
@ REMOTE (Remote Control Connector)
This connector is exclusively for the remote
control unit. 48
ее Ф
remote control cable
@ v
After connecting,
lock
with
this
part.
bh.
@
|
(D-sub 9 2
@ TO COMPUTER (Connector for Computer
Interface)
D-sub 25 Pin connector, RS-232C compatible.
(FUSE
U.S. Version 3A 250V
11.254 250V
(6 OUTPUT L апа R (Output XLR Connectors)
General Version
The balanced XLR (pin 1-ground; pin 2-hot;
pin 3-cold), level is +4dB nominal, with a
maximum output level of +18dB, output imped-
ance- less than or equal to 600 ohms.
9
@ INT/EXT (Word Clock Switch)
Used to switch between the internal word clock
(44.1 kHz) or an external word clock (through
BNC input). The internal word clock is
assumed automatically if no sampling clock is
fed to the BNC input; even if this switch is
on "EXT" (external).
@ A IN/D IN (Analog/Digital Input
Selection Switch)
At “A IN”, analog input is accepted, and at “D
ІК”, digital input is accepted.
@ EXT. W. CLK (External Word Clock Connector)
This terminal can be connected with the word
clocks (sampling clocks) of function genera-
tors and other digital equipment at the TTL
level. The range of the frequency is from 30
kHz to 46.75 kHz (alializing distortion
results when analog input is selected rather
than digital input with a sampling frequency
of under 40 kHz). In this case, data such as
R/T, Delay 1, is automatically adjusted to the
micro-computer.
(0 DIGITAL 1/0 (Connector for Digital
Input/Output)
This is used when an optional unit circuit
board is mounted for digital input and output.
(D-sub 37 Pin)
@ AC~ (AC Inlet)
U.S. Version AC 110V ~120V
AC 220V ~240V
General Version
Note : Optional features and computer inter-
faces are now being planned for future sale.

APPLICATION
INT/EXT
REM/COMP
ANALOG
INPUT
REMOTE
CONTROL
FROM
MIXER
|
TERMINAL
(RCR-1
CABLE)
COMPUTER CONTROL
TERMINAL (RS-232C CABLE)
REV-1
REVERGERATOR
NI , LTO.
220-240У 150W 50/80Hz ^w
MADE. IN JAPAN
4
TO REDUCE THE|RISK OF ELECTRIC SHOCK DO
OVER NO uSER SERVICEABLE PARTS INSIDE
LIFIRD SERVICE PERSONNEL
CONNECTORS AND OTHER
INTERFASE CIRCUIT
BOARDS ARE OPTIONAL
A IN/D IN
AC ~
ANALOG OUTPUT EXTERNAL WORD CLOCK
TO MIXER INPUT INPUT TERMINAL
FOR THE SAMPLING
CLOCKS OF FUNCTION
GENERATORS AND OTHER
DIGITAL EQUIPMENT.
MICROPHONE, ETC.
CHANNE
DIVIDE
L
R
RS-232C
10

MEMORY LIST
MEMORY (ROM) USER'S MEMORY (RAM)
wewory rimas fei
LARGE HALL
—
MIDDLE HALL
SMALL HALL
VOCAL PLATE A
VOCAL PLATE B
PERCUSSION PLATE A
PERCUSSION PLATE B
SPRING
с со -3 СО сл A C N
STRINGS
— e
ELECTRIC BASS
p.
ке
PIANO
— ғә
ОКСАМ
м.
со
BRASS
— >
GUITAR
— сл
HANDCLAP
— e
SNARE
~
KICK
—
co
ECHO ROOM
к- со
DELAY
ғо ©
5ТЕКЕО ЕСНО
х —
STEREO FLANGE
t сз
STEREO PHASING
х
co
TREMOLO
BO a
CHORUS A
BS сл
CHORUS B
х с
CONSTANT DENSITY A
гә ~
CONSTANT DENSITY B
t
со
CONSTANT DENSITY С
to ç
LIVE REFERENCE
e о
L=EZR, R=REV
MEMORY (ROM) : Read Only Memory
USER'S MEMORY (RAM) : Random Access Memory

REMOTE CONTROL UNIT
SECTION V
(Page 21)
YAMAHA Fo Diara seveRBERATOR Aev-1
SECTION VI
(Page 21)
DISPLAY
W/F F/C R/T RATIO
E/R MODE REV. MODE PRESET
=
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MID-LOW
SECTION 1 SECTION Il
(Page 13) (Page 17)
SECTION I SECTION WV
(Page 15) (Page 19)
12

13
(SECTION I)
DISPLAY
W/F F/C R/T RATIO
REV. TIME (R/T)
mmc
LI, LI, CA, sec
MID-LOW
RSEN. ^
-%0 0 dB
DIRECT
@DISPLAY MODE (Display mode selection) Keys
Used to select one of eight display modes (see:
"Remote Control Displays" on page 32).
(LEVEL METER
This meter will show either the input or ihe
output level (from 0 to -60 dB) divided into
16 divisions of LEDs (see next two paragraph
on IN/OUT indicator and key). The clipping
level is shown by the red LEDs. Nominal input
level is -14dB, and nominal output level is
-144В on the meter.
@IN and OUT Indicators
These two LEDs light to show what the level
meter is indicating, either input (“IN") or
output (“OUT”).
@IN/OUT (Level Meter Switching) Key
Press this key to change the level meter to
indicate either input, or output.
(HPF (High Pass Filter) and LPF (Low Pass
filter) Keys
Used to select the cut-off frequencies for the
high pass filter and the low pass filter.
These filters are located after the A/D conver-
ter on the circuit. Press these keys only
after having pressed the "EDIT" key located in
the upper right hand corner of the unit.
The LEDs in the center of the keys will light
when the key is pressed, to show that its fre-
quency is under selection. Press the key
again, or another of the keys in the same row,
and the LED will go out. The filters current-
ly under selection can also be displayed on
the LCD with the crossover frequency displav
mode (the "F/C" key, for this display mode, is
in the first row of keys in the display group
of keys).
(REV. TIME (R/T) Display
This is a 3-digit LED indicator. It displays
reverberaion time at the mid-low frequency
band (around 500 Hz to 1 kHz). It can be
selected up to 99.9 sec. in steps of 0.1 sec.

@The DIRECT ON Key
This key is in the “DIRECT” section of the
panel. It is used to select or cut off the
input of direct sound. Press this key only
after having pressed the “EDIT” key located
in the upper right hand corner of the unit.
When the key is pressed, and the LED lights,
direct sound input is allowed; if it turns
off, direct sound input is cut off.
(&The DIRECT Sound Level Indicator
This is the set of three LEDs in the "DERECT"
section of the panel. One of these three
LEDs will light when a memory is called up:
"D" When this LED lights, the direct sound
level of the memory which has been called up
is higher than the level indicated by the
current position of the control.
“ГІ” When this LED lights, the direct sound
level of the memory which has been called up
is the same as the level indicated by the
current position of the control.
"«]" When this LED lights, the direct sound
level of the memory which has been called up
is lower than the level indicated by the
current position of the control.
(ФТһе DIRECT Sound Level Control
Used to control the mixing level of direct
sound. The direct sound input is mixed with
early reflection and subsequent reverberation
input, and the mixed output is controlled by
the "MASTER" level control. Set the direct
sound level with the following procedure:
1.Press the "EDIT" key in the upper right
hand corner of the unit.
2.Rotate the "DIRECT" sound level control
until the LED in the center of the level
indicator lights. Now the direct sound
level is ready to be modified.
14

15
(SECTION П)
E/R MODE
EMEN
CLULLI, ms
@ E/R MODE (Early Reflection Mode
Select) keys
Used to select one of the eight different
basic early reflection modes after pressing
the "EDIT" key. Selection of one of these
modes is the first step made after recalling
a memory, in order to make early reflection
settings. The eight modes are as follows:
ROOM
HALL-S (small)
HALL-M (medium)
HALL-L (large)
RANDOM
REVERSE
PLATE
SPRING
CO —1 C5 Cn > CO bo —
lJ H Hd H H H H
Echo time patterns for each mode are shown on
page 39. The relationship between "ROOM
SIZE” settings (1/8 to 8) and the actual
volume of the “ROOM” (m) for each mode is
shown on page 40.
© ROOM SIZE Indicator
This is the set of three LEDs above the "ROOM
SIZE" selector. It is used to indicate if
the room size value read from a memory is
larger than, smaller than, or equal to the
current setting of the "ROOM SIZE" selector
underneath it.
(& ROOM SIZE Selector
Used to select one of the eight preset room
size values (1/8 to 8). When the room size
setting is changed, early reflections also
change. When operating this selector, first
press the "EDIT" key in the upper right hand
corner of the unit, and then rotate the selec-
tor in the direction indicated by the room
size indicator, until the LED in the center
of the indicator lights. Then, the setting
can be changed if desired.
(0 E/R NUMBER Indicator
This is the set of three LEDs above the "E/R
NUMBER" selector. It is used to indicate if
the number of early reflections read from a
memory is larger than, smaller than, or equal
to the current setting of the "E/R NUMBER"
selector underneath it.

(9 E/R NUMBER (Early Reflection Selector)
This selector has eight settings in a range
from ] to 40.
To change the E/R number, first press the
"EDIT" key in the upper right hand corner of
the panel, and then adjust the E/R selector
until the LED in the center of the E/R indi-
cator above the selector lights. Then, the
setting can be changed if desired.
(б LIVENESS Indicator
This is the set of three LEDs above the
"LIVENESS " selector. It is used to indicate
if the liveness value read from a memory is
larger than, smaller than, or equal to the
current setting of the "LIVENESS" selector
underneath it.
@ LIVENESS Selector
Sound absorption (attenuation) can be adjust-
ed within a range of eight settings (1 to 8).
The closer to "8", the more "live" the sound
output will be, and the closer to 41”, the
more "dead" the sound output will be.
To change the liveness setting, first press
the "EDIT" key in the upper right hand corner
of the panel, and then adjust the control
until the LED in the center of the liveness
indicator above lights. Then, the liveness
value can be changed if desired.
The Liveness AUTO key
To use this key, first press the "P" key in
the upper right hand corner of the panel.
Then press the key, and the LED in the center
will light. At this time, the liveness value
becomes automatically controlled, and is set
to a standard value which is calculated ac-
cording to the reverberation time.
@ E/R DELAY (D]) Display
This is a 3-digit LED indicator. It displays
the difference in time between the direct
sound and the arrival of the first early
reflection. The early reflection delay time
сап be set from 0 to 600 msec in steps of 1
msec.
00 E/R Delay AUTO Key
When this key is lit, the early reflection
delay time will be controlled automatically
and will be set to a standard value which is
calculated according to the E/R mode and the
“ROOM SIZE". To operate, first press the "P"
key in the upper right hand corner of the
panel, then press this key.
(D E/R Level AUTO Key
When this key is lit, the early refrection
level is controlled automatically, and set to
the maximum level. Press the "P" key in the
upper right hand corner of the panel before
using this key.
(2 EARLY REFLECTION ON Key
Press the "EDIT" key in the upper right hand
corner of the panel before using this key.
When lit, early reflections are sent to the
output; when pressed again, the LED goes out,
and early reflections are removed from the
output.
@ E/R Level Indicator
This is the set of three LEDs above the
"EARLY REFLECTION" selector. It is used to
indicate if the E/R value read from a memory
is larger than, smaller than, or equal to the
current setting of the "EARLY REFLECTION"
selector underneath it.
(b EARLY REFLECTION Level Control
Press the "EDIT" key in the upper right hand
corner of the panel before using this level
control. Then adjust it until the LED in the
center of the indicator above is lit. After
that, it can be adjusted. It controls the
output level of the early reflections which
are then mixed with the "DIRECT" sound and
"REVERBERATION" outputs; the result of which
is controlled by the "MASTER" level control in
the lower right hand corner of the panel.
16

17
(SECTION IH)
REV. MODE
о 0 dB
REVERBERATION
(D REV.MODE (Reverberation Mode Setting) keys
One of these keys can be set as standard for
reverberation output:
1 - SHD (Super High Density)
2 - HD/HID (High Desity/High Initial
Diffusion )
3 - HD/LID (High Density/ Low Initial
Diffusion )
4 - MD (Medium Density)
5 - MLD (Medium LOW Density)
6 - LD (Low Density)
7 - SLD (Super Low Density )
8 - ESD (Equally Spaced Diffusion)
Press the “EDIT” key in the upper right hand
corner of the panel before using these keys.
Press the “REV” key of the “DISPLAY” group of
keys in the upper left hand corner of the
panel, and the LCD will show the mode under
selection.
@ HIGH Indicator
This is the set of three LEDs above the
“HIGH” selector. It is used to indicate if
the high range reverberation time value read
from a memory is larger than, smaller than, or
equal to the current setting of the "HIGH"
selector underneath it.
(9 HIGH (High Range Reverberation Time)
Selector
Press the "EDIT" key in the upper right hand
corner of the panel before using this selec-
tor. Then adjust it until the LED in the
center of the indicator above is lit.
After that, it can be adjusted. Settings can
be made in a range of 1] settings from -5 to
+5. The high range reverberation time (later
reverberation time) settings are in reference
to those of the mid-low range.
(0 MID-HI Indicator
This is the set of three LEDs above the "MID-
HI" selector. It is used to indicate if the
mid-high range reverberation time value read
from a memory is larger than, smaller than, or
equal to the current setting of the “MID-HI”
selector underneath it.

(5) MID-HI (Mid-High Range Reverberation Time)
Selector
Press the "EDIT" key in the upper right hand
corner of the panel before using this selector.
Then adjust it until the LED in the center of
the indicator above is lit. After that, it can
be adjusted. Settings can be made in a range
of 11 settings from 0.2 to 1.2. The mid-high
range reverberation time (later reverberation
time) settings are in reference to those of the
mid-low range (which becomes 1.0).
(& LOW Indicator
This is the set of three LEDs above the "LOW"
selector. It is used to indicate if the low
range reverberation time value read from a
memory is larger than, smaller than, or equal
to the current setting of the "LOW" selector
underneath it.
@ LOW (Low Range Reveberation Time ) Selector
Press the “EDIT” key in the upper right hand
corner of the panel before using this selector.
Then adjust it until the LED in the center of
the indicator above is lit. After that, it can
be used. Settings can be made in a range of 11
settings from 0.4 to 2.4. The low range rever-
beration time (later reverberation time) set-
tings are in reference to those of the mid-low
range (which becomes 1.0).
4K, 2K, and 1K Keys
These three keys are located to the left of the
"MID-HI" selector. Press the "EDIT"key in the
upper right hand corner of the panel before
using them. They are used to set the crossover
frequency between the “MID-HI” range, and the
"MID-LOW" range.
@ 500, 250, and 125 Keys
These three keys are located to the left of the
"LOW" selector. Press the "EDIT" key in the
upper right hand corner of the panel before
using them. They are used to set the crossover
frequency between the "MID-LOW" range, and the
"LOW" range.
00 REV. DELAY 2 (02) Display
This is a 3-digit LED indicator. It displays
the difference in time between the direct
sound and the arrival of the first subsequent
reverberation. The subsequent reverberation
delay time can be set from 0 to 600 msec in
steps of 1 msec.
@ф REV. Delay AUTO Key
When this key is lit, the subsequent
reverberation delay time will be controlled
automatically and will be set to a standard
value (Delay 1 +15т5). То operate, first
press the "P" key in the upper right hand
corner of the panel, then press this key.
(2 REV. Level AUTO Key
When this key is lit, the subsequent reverber-
ation level is controlled automatically, and
set to a standard. Press the "P" key in the
upper left hand corner of the panel before
using this key.
(3 REVERBERATION ON Key
Press the "EDIT" key in the upper right hand
corner of the panel before using this key.
When lit, subsequent reverberation is on the
output; when pressed again, the LED goes out,
and subsequent reverberation is cut.
(4) REV. Level Indicator
This is the set of three LEDs above the
"REVERBERATION" selector. It is used to indi-
cate if the reverberation value read from a
memory is larger than, smaller than, or equal
to the current setting of the "REVERBERATION"
level control underneath it.
(9 REVERBERATION Level Control
Press the "EDIT" key in the upper right hand
corner of the panel before using this level
control. Then adjust it until the LED in the
center of the indicator above is lit.
After that, it can be used. It controls the
output level of the subsequent reverberation,
which is then mixed with the "DIRECT" sound
and "EARLY REFRECTION" outputs; the sum of
which is controlled by the "MASTER" level
control in the lower right hand corner of the
panel.
18

(SECTION IV)
PRESET
ВЕЕ
Іо|І Іс!
Ф
oong
PANEL
P_ EDIT AUTO
@
MEMORY
Ci ГІ
LLLI.
M STR НСІ
(D PRESET Keys
These keys are located at the top of the far
right column of the panel. When the unit
leaves the factory, they are pre-set with
data
from
the
ROM,
numbers
1
to
8.
The
user
can
change
these
settings
at
will,
using
data
from
any
one
of
the
90
memories
(ROM
and
RAM
included).
They
are
used
to
simplify
opera-
tion
because
the
data
recorded
with
these
keys
can
be
read
instantly.
ж See page 3l item 19.
19
(Q PANEL Keys
P
This key is used to set parameters without
utilizing pre-set or memory data. Press this
key, and the LED in the middle will light.
At this time parameters indicated by the cur-
rent settings of keys and controls can now be
set, or modified and set.
EDIT
This key is used to modify preset or memory
data. If the LED of the "P" key is still lit,
this key cannot be used. Press this key, and
the LED in the middle will light. At this
time, parameters are ready to be edited.
AUTO
This key is used to turn all "AUTO" keys
on or off simultaneously. It can be used
only when the LED of the "P" key is lit.
(& MEMORY Display
This is a 2-digit LED indicator. It will
display memory numbers from 1 to 99.
Memories from 1 to 30 have parameters already
set. They can be recalled and used.
Adjusted data can be stored in user-
programmable memories 31 to 99.
(4) MEMORY Keys
M (Memory) Key
This key is used to recall or store data in a
memory. Press this key, and whether or not
the "MEMORY "display is lit, the current mem-
ory number will be shown on the "MEMORY" dis-
play.
STR (Store) Key
This key is used to store adjusted data in a
memory. Press the "M" key, specify the mem-
ory number (31 to 90) with the ten-key
numeric pad, and finally, press this key.
RCL (Recall) Key
This key is used to recall data in a memory.
Press the "M" key, specify the memory number
(1 to 90) with the ten-key numeric pad, and
finally, press this key.