Casio DG-20 Operator's manual

Player’s Manual ...1
Manual del Ejecutante ...11

Thank You
And congratulations on your
choice of the CASIO DG-20 Digital
Guitar. Your digital guitar is an
entirely new type of digital musical
instrument, which features the
latest in state-of-the-art digital
technology.
Read the
Manual
To obtain optimum performance
and assure long-term reliability, be
sure to read this manual carefully
before playing your new DG-20
guitar.
■ Contents of this manual are
subject to change without notice.
■ CASIO has done its best to
include all pertinent information
on the DG-20 in this manual. If you
should find any errors or have
questions on the contents, please
contact your distributor.
■ CASIO reserves exclusive rights
to the contents of this manual.
■ CASIO does not claim
responsibility for damages or
claims incurred as a result of the
use of the DG-20 or this manual.
Important
Precautions
■ Please be careful of extreme
temperatures, moisture and
direct sunlight.
Please avoid using or storing your
DG-20 in places subject to direct
sunlight, excessively damp places
or near air conditioning and
heating appliances where
temperatures and moisture tend to
be extreme. Also, do not leave this
unit in an automobile with the
windows closed during hot
summer months.
■ Please do not drop this
instrument or subject it to
strong shocks.
Subjecting this precision
instrument to strong shocks may
cause malfunctions or damage the
neck, so please use extreme care
in handling.
■ Make sure no foreign matter
gets inside of this unit.
Please take care that no foreign
objects, especially metal objects
such as hair pins, sewing needles
or coins get into the unit. Any
metal objects or liquids entering
the unit may cause malfunctioning
as well as an electric shock
hazard.
■ Customizing may cause
malfunction and accidents.
The DG-20 uses many high-
precision electronic components.
Converting it in any manner or
needlessly touching internal parts
may cause malfunction and
accidents and should therefore be
avoided under all circumstances.
■ Do not use thinner or similar
chemicals when cleaning this
unit.
To clean the DG-20, wipe the
exterior surface with a soft cloth
dampened with a neutral
detergent solution which has been
wrung out completely. Never use
paint thinner, benzene or other
solvents.
1

Contents
Features and Functions
3
Power Supply
6
Changing Strings
7
Digital Performance
8
Specifications
9
Troubleshooting Guide
10
Music Score
21

Overall View
© Power Switch
Used to turn power ON and OFF.
© Main Volume Control
Used to control volume of guitar
sounds.
( 3 ) Rhythm Volume Control
Used to control volume of rhythm
sounds.
( 4 ) Speaker
High performance 12cm (4 3 /4 inch)
built-in speaker.
(5 Mute Key
Used to mute sound during
performance.
@ Start/Stop Key
Used to start and stop selected
auto-rhythm.
© Synchro/Fill-in Key
Used to select Synchro introduction
or insert fill-ins in auto-rhythm
Performance. When pressed,
Tempo Indicator (©) flashes
selected tempo. When a string is
played, the auto-rhythm begins
automatically, in synchronization
(from 1 st beat). When pressed
during auto-rhythm performance,
an appropriate fill-in is inserted in
the rhythm pattern.
Press the Synchro/fill-in once
more to cancel the synchro start
mode.
(§) Drum Pads
When these pads are tapped,
corresponding drum sounds are
output.
Performances Using
Auto-Rhythm and
Drum Pads
When drum pads are tapped
during auto-rhythm performance,
the auto-rhythm automatically stops
(allowing a manual fill-in). The
rhythm then starts again from the
beginning of the next measure.
While the rhythm is stopped, the
Tempo Indicator flashes out each
beat, acting as a metronome.
3

Side Panel
Control Section
© Tone Selectors,
© Select Key,
© Select Indicator
The tone selectors are used to
specify desired guitar tones. Note
that two tones are assigned to
each tone selector. When the
select indicator is OFF, the upper
tones are specified. To select a
lower tone (written in green), press
the select key. The select indicator
lights indicating lower tones may
be selected.
Note that effects such as
Chorus and Vibrato are built-in
to various tones.
© Rhythm Selectors,
© Select Key,
© Select Indicator
The rhythm selectors are used to
specify desired rhythms. Note that
two rhythms are assigned to each
rhythm selector. When the select
indicator is OFF, the upper
rhythms are specified. To select a
lower rhythm (written in green),
press the select key. The select
indicator lights indicating lower
tones may be selected.
© Tempo Control Keys
Used to adjust rhythm tempo.
Press the < A > key to speed up
rhythm, or the < ▼ > key to slow
rhythm down. Hold the key down
to make major changes in tempo.
Press both keys simultaneous¬
ly to initialize tempo (reset at
factory setting J = 120).
© Tempo Indicator
Indicates the tempo of auto¬
rhythm. Lights to indicate the first
beat of each measure. Also lights
when in stand-by status in
Synchro start mode.
©Tone _
Selectors
) Select.
Key
© Select
Indicator
TONE
ACO
GUITAR 1
ACO
GUITAR 2
ACO
GUITAR 3
■ sco
GUITAR 4
ELEC
GUITAR 1
ClEC-
miAEL2_
FLANGER
DISTOR¬
TS_
GLOCKEN
CRYSTAL
HARP
FUNKY
CLAVI
SHAMISEN
MANDOLIN
7SZ2—
ORGAN
ORGAN
TRUMPET
FLUTE
CHORUS
CLARINET
SELECT
RHYTHM
Pulse Code Modulation
ROCK
16 BEAT
POPS
REGGAE
COUNTRY
ENKA
SWING
BLUES
BOSSA
NOVA
SLOW
ROCK
WALTZ
TANGO
SELECT
TEMPO
cT
Sustain/
reverb
£
SOLO
TRANSPOSE
©Transpose
Keys
■ © Rhythm
Selectors
® Select
Key
@ Select
, Indicator
@ Tempo
Indicator
© Tempo Control
Keys
1
) Sustain/Reverb
Selector
)Solo
Selector
® Sustain/Reverb Selector © Solo Selector
When corresponding indicator is
ON, sustain or reverb effect is
added to selected Tone. When
OFF, sustain or reverb effect is not
added to selected Tone. Note that
switch is in the ON mode immedi¬
ately after power is turned ON.
Used to select monophonic (solo)
or 6-note polyphonic performance
modes. Indicator lights to indicate
Solo mode. Solo selector is OFF
when DG-20 power is turned ON.
© Transpose Keys
Used to raise or lower key in 11
half-step increments. Key is raised
one half step each time the < ▲ >
key is pressed, and lowered one
half step each time the < ▼ > key
is pressed.
Note that pitch is set at
A4 = 442Hz in initialized state
(when power is turned ON).
4

Connections
Connect headphones for private
listening (useful at night).
© L ine Output Jack
Connect audio or musical instru¬
ment amplifiers.
© AC Adaptor Jack
Input cord from AC adaptor (AD-5)
when using home current or car
adaptor (CA-5).
© Foot Switch Jack
Connect optional foot switch (SP-2,
SP-10, optional) for foot-pedal con¬
trol of auto-rhythm ON/OFF.
© Tuning Control
Used to control tuning, raising or
lowering tuning within a ± 50
cents range. Useful in matching
tuning with other instruments.
© M IDI Mode Switch
Used to select either MIDI mode 3
(MODE I) or mode 4 (MODE II).
@ MIPi Out Terminal
Connect DG-20 to other MIDI
instruments or devices. MIDI
messages transmitted through
this output. (Refer to page 8 for
further information on MIDI).
1. When a string is played, the
string’s vibration is sensed by a
built-in sensor and the selected
tone is output through the built-in
speaker.
2. The digital guitar features
switches which are actually built-in
to the fingerboard, behind each
fret. If your finger(s) is not properly
centered over the strings you
depress, neighboring strings may
sound (even though you haven’t
depressed neighboring strings), as
the switches may be activated.
No sound is output if strings
are played too softly.
There are two different basic types
of preset sounds built-in to the
DG-20—sounds which decay, such
as the acoustic guitar tone, and
sounds which are sustained, such
as the jazz organ tone. Sustained
sounds may be cut off by using
the mute key, or by releasing the
fretboard (which turns OFF the
built-in sensor switch).
Fingerboard String
L . -.r.
ON/OFF
Vibration
_ i
▼ ...
Sensor Switch
Sensor
(Pitch) 1
T
' (Sound)
i
LSI Circuitry
Z". i
Speaker
► M I D I
Out
Output
5

Batteries
Household
AC Current
Car Cigarette
Lighter
Remove the battery compartment
cover and insert batteries, taking
care that polarity is correct. When
replacing batteries, be sure to
replace all six to ensure longer
battery life.
Turn power OFF before
replacing batteries.
life of high-performance
5UM-1 dry cells is approximately
10 hours. Weakened batteries will
? au ®® th e power indicator to lose
brightness and result in lower
volume, poor tonal quality and
wentually misoperation of
unctions. If such symptoms occur,
Place all six batteries with new
ones as soon as possible.
r
Connection Panel
Connecting AC
Adaptor
Connection of an AC adaptor
(AD-5, optional) allows the unit to
be powered by standard
household current.
Use only an adaptor with the same
voltage rating as your local power
supply.
Connecting Car
Adaptor
Connection of a car adaptor (CA-5,
optional) allows the unit to be pow¬
ered through a vehicle’s cigarette
lighter socket.
■ Always ensure that the power of
the unit is OFF when connecting
or disconnecting adaptors.
■ Remove batteries from the
battery compartment when the
unit is not used for extended
periods. Battery leakage can
damage electrical components.
■ Only use specified CASIO AC or
Car adaptors to prevent damage to
the unit.
■ Adaptors normally become
warm when connected to the
power source. This is not cause
for worry, but adaptors should be
disconnected whenever the unit is
not used for extended periods.
Auto Power Off
Function
An automatic power cut-off
function activates approximately 6
minutes after the last operation of
the unit. Power supply can be
restored by switching the power of
the unit OFF and then ON again.
6

CHANGING STRINGS
Move Press Down
1. A s shown in the above diagram,
press down on the sensor cover
and move it toward the neck.
Do not use excessive force on
any parts in the sensor assembly.
Pull String Through Notch and Hole
2. A s shown in FIG-1 above,
strings pass through a notch in the
end of the sensor, and then
through a hole in the sensor. After
pulling through a few inches of
string, tie the string as shown in
FIG-2. Next, fix the string tight and
cut off any excess.
3. I n s ert the accessory hex
wrench (large) into the head and
turn it counter-clockwise to slide
the headpiece towards the body.
Next, insert the other hex wrench
(small) in the headpiece and
loosen the screw.
4. N e xt, pull the string through
the hole in the headpiece and
tighten the headpiece screw while
pulling the string taut.
Using the large hex wrench, move
slide the headpiece back into
position to adjust string tension.
Avoid tightening the strings
excessively, as this may lead to
neck warps or other damage.
Also, do not use excessive force
on the neck.
Follow the same procedures to
change all 6 strings.
7

DIGITAL PERFORMANCE
About MIDI
/. Performing Using MIDI
Remote and Ensemble
Performance
By connecting the DG-20 to
another MIDI instrument, 6-note
polyphonic note messages can be
sent to the other instrument.
Through this the DG-20 can be
used to “control” or play the
other instrument, for example a
keyboard instrument.
Sequential
Performance with
Rhythm Machines
and Sequencers
The DG-20 can be used to
start/stop the connected drum
machines or sequencers, for
precision rhythm track or
sequence control.
Control Up To 6
Different Sound
(MUM Mode
By connecting the DG-20 to a CZ-1,
CZ-5000 or other keyboard with a
multi-receive mode, or by connect¬
ing the DG-20 to up to 6 different
keyboards, a maximum of 6 differ¬
ent voices can be controlled by the
DG-20—with a different voice
assigned to each string.
n. Transmitted MIDI
Data
M. Functions of
MIDI Terminal and
MIDI Mode Switch
MIDI Out Terminal
MIDI Out
Terminal
MIDI Mode MIDI OUT
Switch
This terminal is used to send MIDI
messages from the DG-20 to exter¬
nal MIDI instruments and devices.
It is connected to the MIDI IN
terminal of other MIDI instruments.
MIDI Mode Switch
This switch is used to specify the
MIDI performance modes, as
shown below;
MIDI Mode I: Poly mode (Mode 3)
MIDI Mode II: Mono mode (Mode 4)
a. MIDI Mode I: Poly mode (Mode 3)
b. MIDI MODE II: Mono mode (Mode 4)
The DG-2Q Can
Transmit The Following
MIDI Data
1) Pitch, ON/OFF
2) Start/stop
3) Timing clock
4) Program change (voice number,
rhythm number)
5) Portamento (When changed
from MODE I to MODE II,
PORTAMENTO ON is sent auto-
maticaly to Channels 1 through 6.
When you switch from MODE I to
MODE II, PORTAMENTO OFF is
sent on the Basic Channel only).
Voice data transmitted on CH-1 through 6
Rhythm data transmitted on CH-16
□ i
•II
Examples of
MIDI Connections
a. Example of MIDI Mode I
application:
Use the DG-20 to sound a rhythm machine
(RZ-1) with the CZ-1 as a sound source.
_1
~[_r:—
1
OUT
IN THRU
IN
DG-20
RZ-1
CZ-1
CLOCK=EXT
CH-4
CH-1
b. Example of MIDI Mode II
application:
_1_ A
OUT
IN
DG-20
CZ-1
CH-2 1 Vibraphone
CH-3 )
CH-4 [ Brass
CH-5 )
CH-6 Bass
In the above application, the vibraphone
tone can be sounded by a playing strings 1
and 2, with Brass tones on strings 3
through 5, and a bass tone sounded on
string 6.
1st string =
2nd string =
3rd string =
4th string =
5th string =
6th string =
8

Model;
Casio Digital Guitar DG-20
Polyphonic;
6-note polyphonic (mono in solo
mode)
Preset Tones;
20 tones; acoustic guitar 1 ~4,
electric guitar 1 and 2, flanger,
glocken, harp, shamisen, jazz
organ, trumpet, chorus, distortion,
crystal, funky clavi, mandolin,
organ, flute, clarinet
Effects;
sustain/reverb, vibrato (built-in to
tones)
Auto-rhythms;
12 Rhythms (PCM source); rock, 16
beat, pops, reggae, country, enka,
swing, blues, bossanova, slow
rock, waltz, tango
Pram pads;
4 onboard drum pads (snare drum,
high tom, low tom, cymbal)
Rhythm Controls;
start/stop keys, synchro/fill-in key,
tempo control keys, tempo indica¬
tor, rhythm volume control
Other Controls:
transpose (C-B in half-tone incre¬
ments), mute, solo selector
Tuning control:
A4 = 442Hz ± 50 cents (± 1 /4 tone)
Speaker:
12cm (4% inch) dia. x 1 (2.0W)
Terminals:
headphone jack (output impedance
= 3k Q, output voltage = 0.5 V
(RMS) MAX), foot switch jack, MIDI
OUT terminal, AC adaptor jack
(DC 9V)
Power Source;
3-way AC/DC power source;
DC: 6 D-size dry cell batteries
(Battery Life approx. 18 hours)
AC: AC adaptor (AD-5, optional)
Car Battery: car adaptor (CA-5,
optional)
Auto Power OFF:
Power turns OFF automatically
approximately 6 minutes after last
use.
Power Consumption;
4.3W
Dimensions:
995(L) x 340(W) x 95(H) mm
(39 3 /ie" (L) x 1 3 3 /s "(W) x 3 3 /4 " (H))
Weight:
3.4kg (7.7 lbs) including batteries
Standard Accessories:
6 D-size dry cell batteries, 2 hex
wrenches
Optional Accessories:
■ AC adaptor (AD-5) ■ Car adap¬
tor (CA-5) ■ Custom soft case
(SC-70G) ■ Headphones (CP-2)
■ Sustain pedal (SP-2, SP-10)
All optional accessories are
available through your autho¬
rized CASIO dealer.
Design and specifications subject to change without notice.
9