Yamaha BK-4B Owner's manual

Yamaha BK-4B Owner's manual
Keyboards ...... A A LA A LA Le LA RL LA LA 2
This is Your Yamaha Electone ВК-4В .................. 3
The Tone Levers ............... i oo 4
Vibrato ......... ... aa ae ee 5
Pedal Sustain .............. ... A AA La ea aa a a aa a 5
Reverb... ee 5
Spacious Sound ....... a 4 EL LL 4 4 4 A4 4 4 A ee a 4 A LL La G
Auto Rhythm Section ............... . LA La LL LL aa a 7
Auto Bass/Chord Fun Blocks .......................... 8
Expression Pedal ........... 0.2... eraxrendeaoeeaao 10
Headphone Jack В Ce ee ee RR a aa LL 10
Ext. In Jack... eneredraconercanaaoara a. 10
Care of Your Electone ................ 0.0. iin... 11
Do not Be Alarmed If .......... 2.20. LL aa 12
Playing the Electone .............. un... 13
Specifications ........... 0diei0.renoarenenoracao 14
The BK-4B has three keyboards. The upper two are called “manuals” and the lower one, played with the
feet, “pedals.” They have keys and octaves as follows:
Upper Manual 44 keys (3% octaves)
Lower Manual 44 keys (3% octaves)
Pedals 13 keys {1 octave)
The Electone is designed to permit playing the melody on the upper manual with the right hand, the chords
on the lower manual with the left hand, and bass notes on the pedals with the left or right foot.
All keys are arranged in the traditional keyboard method: two black keys, three black keys. Each white
key has a name (from A to G), and the blacks are sharps or flats. “C” is always the white key just below
the left black key in the two-black-key group. Any complete set of seven white keys and five black
keys is called an “octave.”
Same pattern Same pattern
M | (1 Octave! (1 Octave)
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“C” is always at the bottom of the group of two black keys.
Pedals The pedals follow the same pattern; only their shape is different.
Both end pedals are “C”.
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This is Your Yamaha
Electone BK-4B
MP Lower Manual Tone Lovers O Music Hust
OQ Vibrato Lever 8 Roll-top Fallhoard
| O Unper Manual Tone Levers (Power Switch
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E) Pedals @ Upper Manual | MP) Pilot Lamp
| (BD Reverh Balance Control D Lower Manual & Spacious Sound
UM Acverb Control Selector
| Auto Boss/Chord Fun Blocks UY Exprecion Pecal
E) Pedal Tone Lever &Fhythm Foot Switch
Podal Sustain Lover | @ Soventh Chord Foot Piston
O Auto Rhythm Section D Minor Chord Foot Piston
The Tone Levers
To the left of the upper and lower manuals are
series of tone levers which control the Electone
voices which will sound when the keys are de-
pressed. They are divided into groups for upper,
lower and pedals, so that different registrations
can be set for each.
Upper Manual Levers © 5 voices
Lower Manual Levers @ 3 voices
Pedal Lever © 1 voice 7 ] О
Each lever provides two methods of control. One (max. volume) Sn
is by continuously moving the lever from off to he
full, to achieve the exact setting for that tone, and 1 |
thus balancing the overall tone setting with perfect
precision. Each lever also has two easy-to-feel click (back)
stops, at 1/3 and 2/3 positions. This lets you
refind any setting with mathematical precision and
no guesswork in a matter of seconds.
The BK-4B has two different pitch levels, indicated >
by the numbers 16’ and 8’. These are standard
organ abbreviations showing the tone’s pitch in
relation to the fundamental (written note). An
8" tone will sound just as it has been written. A el
16’ tone (meaning that the wave length of the ee | ONE OCTAVE |.
vibrations are twice as long as 8', or half as fast) 2] BeLow rowenta
will provide a tone exactly one octave lower than Com] FUNDAMENTAL (o.
the written note.
NOTE: When the Auto Bass/Chord section is used, the tone color of the lower manual voices will
change from Horn to Piano, and from Cello to Guitar.
Vibrato is a waving of the tone. You will see
violin and cello players use it freely by an oscillat-
ing motion of the left hand. It increases the
emotional quality of the violin tone. This vibrato
lever @ produces the same vibrato effect.
Pedal Sustain
(full effect)
This control @ provides continuous adjustment
of the sustain effect on the pedals and allows the
pedal note to continue to sound a few seconds
after you have released it. | (back)
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These continuous controls O @ let you add a fullness to your playing much like the acoustics of a concert
hall. Use Reverb to compensate for deadend dull acoustics (due to furniture, rugs, drapes, etc.).
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Spacious Sound
This function produces the same feeling as a revolving speaker.
circuitry, adding full, rich musical expression to your music.
Spacious Sound is available in two speeds. Use SLOW
for stately, liturgical selections, FAST for popular num-
bers. Works on Upper, Lower or both manuals, according
to which of the three selectors you choose.
Use this selector to apply the Spacious Sound to the lower
manual tones.
Use this selector to apply the Spacious Sound to the upper
manual tones. The use of upper and lower selectors
together will apply the Spacious Sound to the whole organ.
Combined with either or both selectors, this selector
determines the speed of the Spacious Sound. Set on
FAST for (tremolo effect), SLOW for (chorus effect).
The Yamaha exclusive Spacious Sound.
A world’s first, this new system is an exclusive development of the outstanding Yamaha electro-acoustic
technology, incorporated in the Electone BK-4B. Successfully incorporating the essential sound quality
of the Yamaha rotary speaker tremolo effect, this new effect is achieved solely through special electronic
Auto Rhythm Section
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—— Tempo Indicator Lamp Synchro-Start sine
— Tempo Control Rhythm Start |
—— Volume Control
— Rhythm Selectors
Balance Control
This section has 8 different rhythm accompaniments, each with its own selector button. There are also
rhythm Volume, Tempo and Tone Balance controls, a tempo indicator lamp and two start switches.
To use the rhythm section, first push the desired selector button (or buttons — you can combine rhythms).
Then switch on normal Start. The rhythm will begin and you can adjust the tempo, volume and tone
balance, Now switch the Start button back off and you are ready. If the Start button is switched on,
the rhythm will begin immediately. You can also leave it off and switch on Synchro-Start instead. This
will automatically begin the rhythm the instant a lower manual note or a pedal note is played, letting
you lead in with a melody or introductory notes on the upper manual first,
This switch is located in the expression pedal housing to the left of
the pedal. Once the rhythm is on, push this switch once to instantly "A
stop it, once again to restart. It lets you stop and restart the rhythm о
in the middle of a selection without using your hand.
NOTE: After the foot switch has been used, be sure it is reset to normal
after vou finish playing your selection, and then make sure
both Start and Synchro-Start switches are off. Otherwise you
may turn on one of the switches in the middle of a new number =*pression Pedal
only to find the rhythm still canceled.
Auto Bass/Chord Fun Blocks
The BK-4B is equipped with a “Fun Block” section of five buttons which can be used in conjunction with
the Auto Rhythm section (see p. 7). It enables you to play a variety of alternating bass chord rhythms
and implies that the pedal and chords automatically match the melody notes, simply by holding down
either a single lower manual key or a lower manual chord, according to which fun block button you press.
From your very first keyboard attempt, the auto bass chord feature will let you sound like a pro, making
full rhythmic use of the lower manual and pedals. Here is how it works.
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e Set the tone levers for the tones you want on the lower manual both Piano and Guitar sounds are avail-
able); use either or both levers to adjust the Auto Bass Chord tone color and volume in the normal way.
Match the setting of the Pedal tone lever to the lower manual tones.
Select a rhythm pattern and push the corresponding button down until it clicks and stays down.
Set the Rhythm Start switch on.
Adjust the rhythm tempo and volume.
Press the Single Finger Chord button.
Now, if you press a C key on the lower manual, a C major chord will play in an alternating pattern which
matches the rhythm pattern and tempo set.
As long as the key is held down the bass chord rhythm
will continue, but will stop as soon as the key 15
released. If the Minor Chord (left) foot piston ®
is depressed at this time, the chord will change to a
minor (i.e., from C major to C minor). Releasing the
Minor Chord foot piston will change the chord back
to major.
If the Seventh Chord (right) foot piston @ is depressed C Chord
at this time, the chord will change to a seventh (1.е,,
from C major to C seventh). Releasing the Seventh
Chord foot piston will change the chord back to major,
If. both foot pistons are held down at the same time, a
minor seventh chord will result (1.е., from C major to
C minor seventh).
In other words, a combination of one lower manual
key and the two foot pistons permits the creation of
either major, minor, seventh or minor seventh chords.
NOTE: The bass note will play the root and fifth of
any chord pressed, except when the Jazz Rock
rhythm is used; in that case the bass sounds the
root only.
e Select the rhythm and set both its tempo and volume
as explained above.
e Depress the Fingered Chord button.
* Play a desired chord (major, minor, seventh or minor
seventh) on the lower manual.
Now as long as you hold that chord it will play ac-
cording to the rhythm and tempo you have set. The
foot pistons have no effect when the Fingered Chord
button is pressed. If the Single Finger Chord and
Fingered Chord buttons are both pressed, the Single
Finger Chord takes precedence.
* Select the rhythm and set both its tempo and volume
as explained above,
® Depress the Constant button and either Single Finger
Chord button or the Fingered Chord button,
* Press the desired key on the lower manual. As long
as this key is held down, the chord, as well as a pedal
hote the same as the root of the chord, will sound as
if they were held down during normal play (i.e.
without any rhythm pattern). As soon as this key is
released the chord stops.
This button can be used in conjunction with the Single
Finger Chord button only. Press both buttons and set
the rhythm (including tempo and volume) as explained
above. Now, when a lower manual key is held down the
bass chord rhythm will play according to the rhythm
set, but will also continue to play even when the key
is released.
The memory function also has another use. When this
button is depressed along with both the Single Finger
Chord and Constant buttons, it provides a continuing
bass chord just as when the latter two buttons are used
alone. In this case, however, the bass chord will con-
tinue to sound even after the key is released.
As with Single Finger Chord play, the Minor and
seventh Chord foot pistons can be used to temporarily
alter the chord.
= =
Minor Chord Foot Piston
-| Seventh AT Foot Piston
C Major Chord
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This button cancels the other Fun Blocks, returning the lower manual and the pedals to normal playing
If it is set on it will sound
NOTE: The Flute 8' voice is not affected by the Auto Rhythm rhythm pattern.
continuously for any key held down. Use itto soften the mood of the Auto Bass Chord ac-
Expression Pedal
This pedal is extremely important for adding emotion to your playing. The pedal is balanced to stay in
any position once set. Rest the entire right foot on the pedal and relax it, pressing with the toe to increase
volume, with the heel to decrease it.
Headphone Jack
A Yamaha headphone set (optional) can be plugged
into the jack under the keyboard. With the
headphone connected, the speaker is automati-
cally shut off, allowing you to play or practice
at any volume level without disturbing anyone.
Ext In Jack
You can connect a tape recorder, record player
or radio to it and then play through the Electone
amplifier and speaker. When connecting other
equipment, however, be sure to match impedances;
the Ext. In jack has an impedance of 30Kohms.
Signals entering through the Ext. In jack are not
regulated by the expression pedal.
- 1 0-
Care of Your Electone
In general you should treat your Electone with the same care you would give any fine
musical instrument. However, the following points are suggested to assure optimum
1. Be sure to use your Electone only on the correct voltage.
If any changes are required, please consult your Yamaha Electone service agent.
2. IT any trouble develops, contact your service agent,
Never touch the circuits or the internal elements of the Electone yourself,
3, When vou have finished playing, be sure to turn off the power switch.
4. In order to clean the keys, tabs, etc., use a damp cloth.
Never apply organic solvents such as alcohol, for they will damage the materials,
5. Do not expose the Electone cabinet to the direct rays of the sun, This can bleach the
finish and lead to separation along the joints, | is also best to choose a location free
of humidity amd currents of heated air,
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6. Be careful not to strike or scratch the cabinet with a hard abject. я
In opening and closing the fallboard, grasp the front lip with both hands and slide it
gently in its groove. Never attempt to raise the fallboard directly upwards. Do not place
heavy objects an it,
= |] ] =
Do not Be Alarmed If...
1. The Electone does not operate when the power switch is turned on; check the following:
e Is the plug fully inserted into an AC outlet (the same as you use for a lamp, etc.)? Reinsert it to be
e |s there power coming from that outlet? Unplug the Electone and plug in a lamp; then see if the
lamp will light. If it does not, the problem is probably in your home's electrical system. Check your
fuses or circuit breakers.
e If you find that there is power in the outlet, but the Electone does not play, unplug the cord and
call your nearest Yamaha dealer. There are NO USER-SERVICEABLE PARTS in the Electone.
2. A note should sound the instant you turn on the switch.
This merely indicates normal operation consequent to a surge of electricity in the main amplifier.
3. Only one note is produced even when two pedals are depressed simultaneously.
In order to achieve tonal clarity, the Electone is designed so that a note is electronically supressed the
instant the next note is struck. If two pedals are struck simultaneously, only the higher one sounds.
4. Occasional unpleasant static occurs,
In the majority of such cases, the cause can be traced to the turning on or off of refrigerators, washing
machines, electric pumps or other household appliances. Electrical fault in a neighboring outdoor neon
sign may also be to blame. |
When the cause is a home appliance, connect the Electone to an outlet as far as possible away from the
offending appliance. This phenomenon, although annoying, poses no danger to the Electone circuitry.
If the cause is a fault in a neon or fluorescent lighting fixture, it should be repaired. When the cause
is unknown, or in case of doubt, contact your Yamaha dealer.
5. The Electone at times reproduces radio or TV sound signals.
This can occur when there is a powerful radio or TV transmitter, or an amateur radio operator located
in the vicinity. If the situation is distracting, contact your Yamaha dealer.
6. Sound rattling (sympathetic vibration) occurs.
All materials have critical resonance frequencies at which they vibrate. Since the Electone produces
continuous tones, it is normal that some will cause windows, shelves, etc. to rattle.
7. Pedal notes sound too high, and upper manual notes too low.
This feeling may be especially strong for players who switch from the piano, because of the difference
in tonal construction. Each piano note is a combination of complicated harmonics, and can be heard
only in its interaction with the surroundings. But Electone harmonics are multiples of the integral
(base) tone, and the instrument cannot be tuned in the same way as a piano.
Playing the Electone
First turn on the power switch. No warm-up period is required. The power is on when the pilot lamp is on;
the Electone operates quietly. This lamp also indicates whether the Electone is on when not in use.
Next, set up a registration (set all the levers and controls you wish to use for the upper and lower manuals
and the pedals). Select tone combinations according to suggestions in the music you are going to play,
or experiment with your own combinations. Remember that the registration noted on any sheet of
music is no more than a suggestion, and your idea may well be even more suitable.
By the same token, do not be alarmed if you have a piece of music with no registration for your organ.
With a bit of imagination you can approximate the registration for a different organ, going on to improvise
on your own. This will be an ever-new source of creative enjoyment as you become more and more
familiar with the various Electone controls and effects.
Upper Manual 44 keys f — ca
(3% octaves)
Lower Manual 44 keys F~ сз
(3% octaves)
Pedals 13 keys C1- C
(1 octave)
Upper Manual Flute 16°
Trombone 16’
Flute 8’
Oboe 8'
String 8’
Lower Manual = Flute 8’
Horn 8’
(or Piano™)
Celio 8
(or Guitar”)
Pedals Bass
It becomes so with ABC.
Pedal Sustain
Reverb Balance (Upper/Lower)
Spacious Sound Upper
Spacious Sound Lower
Spacious Sound Slow/Fast
ABC Selectors
Single Finger Chord
Fingered Chord
Minor Chord Foot Piston
Seventh Chord Foot Piston
Rhythm Selectors
March Jazz Rock
Waltz Rhumba
Swing Bossanova
Slow Rock Samba
Rhythm Controls
Rhythm Start
Rhythm Stop (Foot control)
Tone Balance
Tempo Indicator Lamp
Expression Pedal
Power Switch
Pilot Lamp
Headphone Jack
External Input Jack:
Roli-top Faltboard
Music Rest
Matching Bench
Yamaha JA-3055A 30cm (12%)
Solid State (Incl. {Cs and FETs)
Output Power: 15 Watts (RMS)
Power Consumption: 40 Watts
Power Source: AC, 50/60Hz
Width: 111em (43%)
Depth: 56cm (22)
Height: 90cm (35%)
WEIGHT 55kg (121 lbs.)
FINISH American Walnut Grain
Specifications subject to change without notice.
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