Roland Compurhythm CR-78 User manual

ISS Roland
COMPURHYTHM
CR-78
OWNER’S MANUAL
•An infinite number of rhythm patterns are yours be¬
cause of the adoption of a micro-computer in this
instrument.
•With 11 kinds of percussion instruments as the sound
source, there are 34 different preset rhythm patterns.
Along with this, 2 kinds of ADD VOICE and METAL¬
LIC BEAT, plus CANCEL VOICE which cancels out
different instrument sounds of each pre-set rhythms
offers many variations on the rhythm patterns.
•FILL IN, ROLLING and BREAK produce variations in
rhythmic progression.
•LONG and SHORT FADE IN and FADE OUT are pos¬
sible.
•With the importance of rhythm flow in mind, the
rhythm pattern will change from the next measure.
•ACCENT makes the rhythms musical.
•With the TRIGGER OUT and EXTERNAL CLOCK IN
functions, tempo synchronization with externa! in¬
struments such as a sequencer is made possible.
«CAUTiON»
Turn on the power switch for a twenty four
hour period at least once every six months
in order to charge the memory backup bat¬
tery when this machine is not in regular use.
This unit uses a battery backup to protect the
user-loaded memory data when the power switch
is off. If the battery loses its charge, the memory
will be lost.
If it is not charged for a long period of time,
the battery may swell and leak gas which
may damage this unit.
Plugging or unplugging the cord while the power
switch is on might cause the built-in computer to
malfunction. Therefore always plug in the cord
before turning on the power.
(If malfunction of the computer occurs, turn off
the power switch and 5 seconds later turn it on
again !

NAMES AND FUNCTIONS OF THE COMPONENTS
FRONT PANEL
O POWER
© VOLUME
© BALANCE (Balance Control)
This slider controls the balance of the
percussion sounds. Sliding it upward
will emphasize the high percussion
sounds (cymbal, high hat, maracasl
and sliding it downward will em¬
phasize the low percussion sounds
(bass drum).
0 CYMBAL HIGH HAT
METALLIC BEAT
This slider controls the volume of
METALLIC BEAT to make the sound
of the cymbal (CY.) and the high
hat (HH.) the way you want it to
sound. METALLIC BEAT will occur
at the same time as with the pattern
of the cymbal and high hat in the
pre-set rhythms (for SWING, the
METALLIC BEAT will be simulta¬
neously played with the cymbal , the
high hat , and the METALLIC BEAT).
‘When the Cymbal/high hat Cancel
Button © is on the sounds of
the cymbal and high hat are cancel¬
led, and the METALLIC BEAT will
be played in an 8-beat rhythm which
has on correspondence with the pre¬
set rhythms.
© ADD VOICE — TAMBOURINE
This slider controls the volume of the
tambourine.
©ADD VOICE - GUIRO
This slider controls the volume of
the guiro.
‘ADD VOICE maintains a fixed
rhythm in no relation to the pre-set
rhythms.
© ACCENT — Accent Volume
This knob regulates the amount of
accentuation. Turning it to the right
strengthens the accent.
0 TEMPO — Tempo Control
This knob controls the tempo of the
rhythm.
© TEMPO PILOT LAMP
The lamp lights up at the first beat
of a measure. It indicates the speed
of the rhythm.
® FADE IN — FADE IN Selector
FADE IN is the effect where the
Sound level gradually increases until
it reaches the level of loudness deter¬
mined by the VOLUME 0 control.
Set at OFF when not using the
FADE IN effect.
® FADE OUT — FADE OUT
Selector
FADE OUT is gradual dying away of
the sound.
Set at OFF when not using the FADE
OUT effect.
© START/STOP
® RHYTHM SELECTION
BUTTON
Press the button to choose the
rhythm you want. You can have a
combination of two rhythm patterns
by simultaneously pushing two but¬
tons.
If you push three buttons simultane¬
ously, two rhythms will be selected
First priority —;— | [
ETTTT1 I I U_ED y
® RHYTHM (A,B)—Rhythm Pat¬
tern Selection Switch
Each RHYTHM SELECTION BUT¬
TON © has two kinds of pre-set
rhythm patterns. You choose one of
the two patterns with this switch.
..VARIATION..
The addition of the VARIATION ef¬
fect produces changes in the rhyth¬
mic progression.
© VARIATION SELECTOR
This knob chooses the pattern of var¬
iation in rhythm.
FILL IN: 1-7
Seven variation patterns are pre-set.
In the measure set with MEASURE
SELECTOR, a variation is adopted
instead of a normal rhythm succes¬
sion.
ROLLING: HB. SD.
For HOLING, the following variations
are added;
HB:High Bongo SD:Snare Drum
RHYTHM! A-B)
When the RHYTHM PATTERN SE¬
LECTION SWITCH © is set at A,
this knob changes the rhythm pattern
to B. If it is set at B, RHYTHM
changes it to A.
BREAK
The pattern of a measure of rhythm
and then a succeeding measure of
rest are produced with BREAK,

® MEASURE — Measure
Selector
This knob selects the variation cycle
when you want to make variations
automatically. If you set it at "2",
a variation in rhythm occurs once
every two measures in the second
measure.
Set it at "16" and you will have a
normal rhythm pattern for 15 meas¬
ures and then a variation in the 16th
measure.
® MANUAL/AUTO SELECTION
SWITCH
When you want automatic variations
in rhythm, switch on to AUTO. For
manual operation, select MANUAL
© MANUAL BUTTON
When you want to make variations
manually, use this button. During
performance, no matter when you
press the button, with the function¬
ing computer, a variation occurs in
the following measure.
© CANCEL VOICE - Cancel
Button
These buttons cancel the indicated
instrument sounds when using the
per-set rhythms.
..PROGRAMMER..
With the CR-78, you can create your
own rhythmic patterns and have
them memorized by the micro-com¬
puter circuits.
© TRACKS 1, 2, 3, 4
The diodes with light up in synchro¬
nization with the programmed
rhythm.
© INSTRUMENT SELECTOR
This knob selects the instrument
voice you want.
*At the ACCENT position, rhythmic
accents can be programmed.
© MEMORY — PLAY — ALL
Program Switch
MEMORY: This position it is used
for programming a pat¬
tern or for clearing one
track.
PLAY: This position is used for
reproducing the memo¬
rized rhythmic patterns.
Aside from when not
programming rhythmic
patterns, always the swit¬
ch at play.
ALL: When you want to erase
all four tracks of the pro¬
grammed rhythms, set
it to this position the
Clear Button © ,
© CLEAR — Clear Button
This is used for erasing the memo¬
rized rhythms.
© PROGRAM RHYTHM Buttons
The memory number selection but¬
tons are used for rhythm program¬
ming or for using the rhythms you
have already programmed.
The order of priority is shown in the
diagram below.
I It m IV
REAR PANEL
® OUTPUT (Output Jack)
Use the jack with the input imped¬
ance which matches the amplifier or
instrument being used.
(|) VARIATION
This jack is for using the pedal switch
(DP-1,DP-2) to start a variation rhythm
© START/STOP
This jack is for using the pedal switch
(DP-1, DP-2) to start or stop a rhythm.
© TRIG OUT
This jack is for the output of a trigger
pulse with the same cycle as the
rhythm.
EXAMPLE
By connecting CR-78 to a sequencer
or JUPITER-4, the production of a
same cycle will make it possible to
control the synthesizer.
© 8”, 16”. COMBI
This switch selects the way the pulse
is generated from the TRIGGER OUT
© jack.
°8 beat: produces a pulse eight times
in a measure.
°16 beat: produces a pulse sixteen
times in a measure.
“Combination: changes in 'pattern
according to the rhythm.
"The pulse of the output of the bass
drum, and the high bongo combin¬
ed is produced.
© WRITE
This jack is for connecting the ac¬
cessory TS-1 (or the optional DP-2)
used for programming rhythmic pat¬
terns.
© EXT CLOCK
By connecting an external clock
pulse to this jack, you can control
the tempo of the CR-78 by means of
an external instrument.
By supplying a clock of 48 counts
per measure to the CR-78 from an
external source the CR-78 will be
completely synchronized to it.
*At this point TEMPO CONTROL
and the TEMPO PILOT LAMP on the
front panel have no relations to this
function.
-.EXTERNAL CLOCK PULSE»
PROGRAM Switch at PLAY
Voltage: + 5 — + 15V
minimum pulse width: 5 ms
frequency: 5 Hz — 100 Hz
‘Synchronization takes place at 48
counts per measure.

CONNECTION TERMINAL
INSTRUCTIONS FOR OPERATION
1. A fter following instructions on
HOOKUP, turn on the power switch
of CR-68 as well as of the amplifier
or of the instrument.
POWER
• ON
' *
• Of*
2. C hoose the rhythm you want with
the RHYTHM SELECTION BUTTON
and the RHYTHM PATTERN SELEC¬
TION SWITCH.
3. P ush the START/STOP BUTTON
This will start the rhythm.
4. While listening to the rhythm,
adjust the volume, the balance and
the tempo.
5. Adjust the amount of accentua¬
tion with the ACCENT VOLUME,
(in making variations!
ACCENT
\ ■ /
-N —- ^
■ -( V
«VARIATIOI\l»
FOR AUTOMATIC CONTROL
1. S witch on to AUTO of the
MANUAL/AUTO SELECTION
SWITCH.
2. C h oose the variation cycle with
the MEASURE SELECTOR.
•Setting at "4", once every four
measures, setting at "8", once every
eight measures you wiH get a varia¬
tion in the last measure for each case.
3. C hoose the variation pattern with
the VARIATION SELECTOR.
FOR MANUAL CONTROL
1. Switch on to MANUAL of the
MANUAL/AUTO SELECTION
SWITCH.
2. Push the MANUAL BUTTON and
insert a "variation” in the desired
measure.
The variation will always occur on
the first beat of the following meas-
sure.
For tempo control of rhythms with
the clock signal
To start
You con either pass through the dock signal
first and then press the Start/Stop Button or
press the button first.and then pass the signal.
To stop
First press the Start/Stop Button and then stop
the dock oscillator signal. The rhythm will co¬
mmence from the first beat if started again.
Note
Terminating Just the dock signal will stop the
rhythm and commencing the signal again will
start the rhythm from where it last ended.

THE OPERATION OF THE PROGRAMMER SECTION
The CR-78 will memorize. You can
make your own rhythmic pstterns.
The memory is programmed with the
manual switch (TS-1) or the optional
pedal switch DP-1, DP-2. Four voices
can be used for each rhythmic pattern
and four rhythmic patterns, each of
two measures (96 counts), can be
memorized. Also erasing one voice or
the whole rhythm pattern is possible.
Therefore you can create new pat¬
terns over and over again. The built-
in battery will preserve the memorized
data as long as it is recharged every
six months.
PROGRAMMING
1. C onnect the accessory manual
switch (TS-1) to the WRITE jack on
the rear panel.
2. P ress the PROGRAM RHYTHM
(l-IV) buttons where you want the
rhythm memorized.
3. S et the Program Switch to ALL
and press the CLEAR button. This
will erase any previeously program¬
med rhythm.
4. S et the Program Switch to PLAY.
While striking TS-1, choose an in¬
strument sound from the INSTRU¬
MENT SELECTOR.
5. S et the PROGRAM switch at
MEMORY and the memories are now
ready to accept rhythmic patterns
"played" with the TS-1. Push
START. (The VARIATION switch
should be at OFF). The memories
will accept rhythm pulses at any
time. This means that any number
of measures may be allowed to pass
by in order to get the rhythm and
tempo in mind. Also, if you have ac¬
cidentally omitted a beat, for exam¬
ple, merely wait for the two measure
pattern to repeat and add the beat
where desired.
The above procedure will load the
rhythm pattern for the selected voice
into TRACK 1. The TRACK 1 LED
will flash each time the voice is trig¬
gered.
6. R epeat the above steps for the
next desired rhythm voice. The new
voice will automatically be loaded
into TRACK 2. Repeat again for two
more voices.
•If the ACCENT position of the INSTRUMENT
SELECTOR switch is used, an accent will occur
at any point where the T S -1 is pressed.
•If a mistake is made while loading one of the
voices, press the CLEAR button and do that
voice over again.
■ R emember that beats may be added to any of
the voices at any time without having to clear
the memory and start over. Just select the voice
with the INSTRUMENT SELECTOR and, with
the PROGRAM switch at MEMORY, use the
TS-1 switch to add the desired beats,
•Striking the TS-1 with something hard as a
drumstick will make programming more precise
•For programming rhythm, listen to the tempo
for first 2 measures and from the 3rd measure
start striking the TS-1
’Aside from the method of using the TS-1 f''
The other method is by the use of the
WRITE SWITCH WS-1, sold separatory.
This WRITE SWITCH WS-1 is a writing
machine made exclusively for the CR-78.
The WS-1 divides the rhythm pattern into
steps of either 8-12-24 or 48 and since it is
programed by one step at a time, writing
rhythm can be done accurately and
easily.
For ditails, please refer to the OWNER'S
MANUAL.
PLAYING BACK THE MEMO¬
RIZED RHYTHM PATTERNS
1. Press one of the PROGRAM
RHYTHM button (l-IV) which con¬
tains the desired the rhythm is
memorized.
THE MEMORY CLEAR FUNCTION
(Erasing one voice)
Set the PROGRAM switch at
MEMORY. Use the INSTRUMENT
SELECTOR switch to select the voice
to be erased and push the CLEAR
button.
(Erasing the total rhythm pattern)
Set the program Switch to ALL and
press the CLEAR Button.
CAUTION
‘The PROGRAM switch should be
left in the PLAY position when not
loading the memories in order to
prevent accidental erasure of the
programmed rhythmic patterns.

SPECIFICATIONS
• RHYTHM SELECTION BUTTONS
ROCK 1-4, DISCO 1-2, WALTZ, SHUFFLE, SLOW
ROCK,SWING,FOX TROT,TANGO, BOOGIE,ENKA
(a general in Japanese music), BOSSANOVA, SAM¬
BA, MAMBO, CHACHA, BEGUINE, RHUMBA
SOUND SOURCE
BASS DRUM,SNARE DRUM,RIM SHOT, HI-HAT,
CYMBAL, MARACAS, CLAVES,COW BELL, HIGH
BONGO, LOW BONGO, LOW CONGA
VARIATION SELECTOR
FILL IN 1-7, BREAK, RHYTHM (A-B), ROLLING-
HB, SD
MEASURE SELECTOR (2, 4, 8, 12, 16) :1
CONTROL KNOB :4
LEVEL, BALANCE, ACCENT, TEMPO
SWITCH (BUTTON) 7
FADE IN, FADE OUT,
START/STOP, RHYTHM PATTERN SELECTOR,
AUTO/MANUAL SELECTOR, MANUAL POWER
CANCEL BUTTONS :4
CYMBAL + HIGH HAT, BASS DRUM,
SNARE DRUM, COW BELL + CLAVES
ADD VOICE
CONTROL SLIDERS ;2
TAMBOURINE LEVEL, GUIRO LEVEL
CY HH METALLIC BEAT
CONTROL SLIDER :1
METALLIC BEAT LEVEL
INDICATOR :1
TEMPO (also used as Power Source Pilot Lamp)
PROGRAMMER
INSTRUMENTS SELECTOR KNOB :1
Bass Drum, Snare Drum, Rim Shot, High
Hat, Cymbal, Maracas, Claves, High
Bongo, Low Bongo, Low Conga, Accent
SWITCHES (BUTTONS) :2
MEMORY W/D, PLAY, ALL
CLEAR
INDICATORS :4
TRACK 1-4
PROGRAM RHYTHM :4
SELECTION BUTTONS
I, II, III, IV
• JACK
OUTPUT :2
HI: 220 kQ 3.5Vp-p (220kO Load)
Low: lOkO 5.5Vp-p (10kO Load)
(Vol.: max., Acc. Vol.: max.)
FOOT SWITCH .3
START/STOP,VARIATION (DP-1, DP-2)
WRITE (TS-1)
TRIGGER PULSE OUT :1
OFF: OV/ ON:+15V pulse
• TRIGGER PULSE SELECT IN SWITCH :1
8 beat, 16 beat, combination
• EXT. CLOCK :1
OFF:OV/ ON: + 5 —I-15V pulse, min. 5ms width
• POWER CONSUMPTION
13W
• DIMENSIONS
300(W) X 280(D) X 205(H)mm
11,8"(W) X 11,0”(D) x 8.1 "(H)
• NET WEIGHT
5.5 kg
12.1 lbs.
• ACCESSORIES
2.5m connection cord, TS-1
SPECIFICATIONS ARE SUBJECT TO CHANGE
WITHOUT NOTICE.
PRECAUTIONS
* Keep away from interferences that induce high
levels- of noise, such as flourescent lamps, neon
lights and transformers as much as possible.
* Tone quality might vary depending on the amplifier
used.
* Rough manipulation of the power switch can be
the cause of failure in the computer component.
* Avoid places that are dusty, of high temperature or
high humidity.
* Use neutral detergent when cleaning the control'
panel and a soft, dry cloth for the wooden body.
‘Do not use solvents such as paint thinner.
OPTION
PEDAL SWITCH DP-2
CR-78 OWNER'S MANUAL '80 NOV. A-3
Mi Roland