Yamaha BK-20A Owner's manual

Yamaha BK-20A Owner's manual
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Introduction ---................ enencacioncenererecacecanoneronecasareranererenenenarere. пене. 1
This is Your Yamaha Electone BK-20A ----.--.....eecercccnereneroce ne enero 9
Keyboards ..............ee0eeemeooccennee. Panibaacnceceocoleocaniceneneanananacanans renee 3
The Compass of the Electone BK-20A -........... PP 4
Tone Levers -----....-............ Nreoncacoee. reer. eceoneoonorenorcarcanoecaneo boss sasause 5
Tone Levers Registration 0008 000000000000000000008 sassccecenne eee o nerccccocoreoacao enoceno 7
Effect Levers -------....... 000000000000000000008 neoecacerceneneceone mereeéeescecees eee ces rues 8
Upper Preset Tones 6600000 000000000003088 eneroneccnanarenenecenoenene acsccencaracaseeorecocoao 10
Effect Controls and Selectors eooocercaceoancarecrorecarcecrovearaovereneroraoceraceceves . 11
Sound-in-Motion Tremolo ------------.ereeeeee eee es 12
Auto Rhythm Section ----- eet errr e terete eaten ar ce e. neneonacrereoreceeoee. Crean 13
“Auto Bass/Chord System --...........e.e.... sassases seras acc scene SA ere .15
To Fully Enjoy Your Electone -----------.--<.- a ecesscccane eenacaccorencacecorecacere oe. 18
Care of Your Electone ------.--.===-eeeeneeeeeie es DA]
— Do Not Be Alarmed lf-------....--.....................…rreurs eee enenooocorereccarerecare 21
Specifications ---------=ereeieecconerereeranen enn aroencen eo rca. OO
Introduction
Congratulations upon your selection of this Yamaha Electone. lt is one of the world's most advanced
musical instruments, carefully designed and built to provide a lifetime of musical enjoyment.
“To make sure you derive the most from its generous features and durable IC & FET circuitry, please read
this manual thoroughly before attempting to play. Then keep it handy for reference. Use it to develop
your own techniques and to teach others. With a little care your Electone will become a creative center of
family enjoyment for decades. |
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~ This is your Yamaha Elec
e Fiute 16'
Percussive 23” Q | ® Flute 8’
Q Fiute 4
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Ф Trombone 16°
- Percussive 4° O
— Percussive Length ©
Vibrato Speed ©
Vibrato o
Cetto 4 © Ф Oboe 8’ a | Power Switch @
Сено в’ © @ String 8’ © @ MusicRest
Horn 8 © @D String 4°
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Fute 4 © D WAH-WAH
Repeat Speed
Auto :
Rhythm Section
Flute 8' @
Brush O
Roll-top Falibosd @
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Pedals
Manual Balance
Brilliance
Preset Tone Selectors Expression Pedal
Foot Switch Selectors
Bass Guitar |
Bass 16° : “Upper Manuat @
Pedal Sustain . | | Reverb
Pedai Cymbat | |
Auto Bass Chord
Miran Draco: Ensemble
Rhythm stop/start @
Foot Switch |
Lower Manual
@ Brass 8 | ‘ ВЕ | Master Volume @
Tremolo Selectors @) |
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The BK-20A has three keyboards. The upper two are called “manuals” and the other, for the feet, composed
of “pedals.”
Upper Manual 44 keys (3 Y octaves)
Lower Manual 44 keys (3%’ octaves)
Pedals В 13 pedals (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 other, and bass notes on the pedals with either foot.
“All keys and pedals 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 is called
an “octave.”
One octave
UPPER
MANUAL
LOWER
MANUAL
J U U U CU J Y U
PEDALS
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C, C © This is standard procedure for bass instru-
- ments.
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To the left of both upper and lower manuals are a series of tone levers which contro! the voices (instrument
sounds) which will sound when the keys are depressed. They are divided into groups for upper, lower and
pedals, so that different registration can be set for each.
Upper Manual Levers 9 voices
Lower Manual Levers 5 voices
Pedals ~~ 2 voices
FLUTE FLUTE FLUTE FLUTE TROMBONE BRASS OBOE “ STRING STRING
5 E A 2 WW g в 8 «
BRUSH FLUTE . FLUTE WORN CELLO - CELLO CYMBAL SUSTAIN BASSI6" BASSGUITAR
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— — LOWER — J - ВЕ CL venas —
Exclusive Yamaha Tone Lever System . ,5210
Each lever provides two methods of control. One
is by continuously moving the lever from off to
full, to achieve the exact setting for that tone, and
thus balancing the overall tone setting with perfect
precision. Each lever also has two easy-to-feel click
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.
Bear in mind that the total tone lever settings for
a particular manual will affect that manuals overall
volume. This will be an expressive aid if used
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Harmonics
The BK-20A has four different tonal harmonics, indicated by the numbers 16°, 8, 4° and 2%". 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 16’ tone (meaning that the wave length of the vibrations are
twice as long as 8’, or half as fast) will provide a tone exactly one octave lower than the written note.
Similarly, 4” tones are one octave higher than the written note, and 2%’ tones one octave and a fifth above
the fundamental. -
ONE OCTAVE
ONE OCTAVE ONE OCTAVE
FUNDAMENTAL FUNDAMENTAL | ABOVE
FUNDAMENTAL
For example, if you press middle C, corresponding to the keys in the chart below will sound be produced.
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Depressing MIDDLE C
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In other wards. the 16’ lever extends the lower manual a full octave as shown bv the dotted line in the
To ll В | e Y Ё [NO | В [ | O | | al | 0 Л CTA DOCTORADOS
For the best result of your performance, you should always take into consideration the correlative tone
volume balance among the three keyboards i.e., upper manual, lower manual and pedals.
When you wish to emphasize the melody played on the upper manual, for example, the volume of the lower
manual and pedals should be kept under that of the upper manual. On the contrary, if you want to stress
the accompaniment part on the lower manual or pedals, the volume of that particular keyboard should be
adjusted relatively larger than the others.
Yamaha's unique variable volume control tone levers enable you to control this correlative tone volume
‘among three keyboards. Judge by your own ears and adjust the position of tone levers in advance. Each tone
lever slides continuously from off to full volume for sensitive balance control.
Three distinct stops also convenient to click your favorite tonal combinations into place for quick, easy,
easy settings.
(EXAMPLE)
© UPPER
1 FLUTE UTE FLUTE FLUTE TROMBONE BASS | 080% STRING STA
© LOWER о a a e PEDALS
CYMBAL SUSTAIN BASS BASSGUITAR=
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These levers control a variety of effects which add a host
of tonal variations to the Electone's voices. Each lever works
in the same way as the tone levers, with both infinitely-variable
continuous control and click-stop settings.
o Upper Percussive: OO O
Changing the beginning of some or all notes can do wonders
for lively selections. Your Electone’s percussive effects provide
subtle but important shading at the moment each note is
heard. The special popping 4’ and 2%’ percussive drive can be
smoothly blended into all upper manual tones with two
variable levers (4° and 2%’), and a separate lever Length
regulates the length of decay for these effects. |
With percussive, use a detached fingering. Each note should be
played cleanly; slurred notes will diminish the percussive
impact.
e Vibrato: 0 ©
Vibrato is an emotional wavering applied to a tone most no-
ticeable in the trembling left hand of violinists and cellists. It
can add a great deal to the emotional depth of a passage,
especially string voices. The Vibrato lever provides continuous
adjustment of this effect's depth while Vibrato Speed lets you
continuously set the vibration speed.
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Cuts and repeats each note just like the double-strumming
effect of a mandolin. The lever provides continuous speed
adjustment to create a full variety of different moods.
Affects upper manual notes only.
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© Attack Wah Wah : ©
Provides a subtle muting effect at the beginning of each upper
manual note. It works on successive notes even if the first is
This control provide continuous adjustment of the sustain
effect on the pedals concerned. For the pedals, this is the only
sustain control, and it affects all pedal tones with the
exception of Bass Guitar with sustains Automatically.
۩ Pedal Cymbal: @ |
Provide lively brush (hissing snare drum brush) and cymbal
percussion sounds with each lower manual or pedal note.
© Organ Preset Ensemble: @
This lever controls the effect which add the upper tone to
“the upper preset tone (Accordion, Piaho, Banjo, Vibraphone.)
(See page 10).
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ar Preset Tones
To the left of the lower manual are eight Upper Preset Tone controls (seven tones plus Cancel). These on/off
switches are special tonal blends that most closely resemble the instruments they name (Accordion, Piano,
Hawaiian Guitar, Banjo) as well as three special preset combinations.
These selectors have two characteristics which must be remembered. Since they are factory preset, they
automatically cancel all other upper manual! tone lever settings. This lets you switch back and forth.
In addition, precedence is to the right. This means that if two or more buttons are pressed, the one to the
right will take effect. To switch from one button to another it is not necessary to first press the cancel
button.
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Effect Controls and Selectors
selection or passage.
of a large hall or auditorium. This control is
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® Manual Balance : © o — —
MANUAL BALANCE @
This control governs the relative strength of the upper and №
lower manuals. It is normally left in the center position, but E
can be shifted to stress the melody or accompaniment in a
This control can also be used to compensate for a higher
number of total tone lever settings (which would ordinarily
result in higher volume) on one of the two manuals.
@ Brilliance: @ Upper _ Lower
With this single, continuously-variable contro! you manual *—————” manual
can pinpoint the degree of overall softness or stressed | stressed
clarity desired for any mood of music. |
© Reverb: O Ff
Reverberation is the quality that makes your play- 3 BRILUANCE @ — | REVERB @
ing sound full and rich, as if you were on the stage
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continuous, so that the reverberatory effect can
be set to any degree of strength, as the music
requires. |
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€ Glide (Located to the left of the lower manual and Expression Pedal) :
Turning the Glide tablet “ON” and depressing any key, all notes will sound slightly lower (approx. 100
cents) than the true pitch when the foot switch on the expression pedal is pushed to the left with your toe
on Expression Pedal. When the foot switch is released, the pitch will gradually return to normal. This effect
is suggested to be used when playing Hawaiian music.
. . | TREMOLO
Lets you divert upper manual tones from the main NY SN
to the tremolo speaker. | © ower [| ter || Tremolo || cons
@ Lower Voice (Main/Rotary) : @ _ a Voice |] Voice
Does the same for lower manual tones. | o
“Manual and upper preset buttons 1, 2, 3 to the
When the speed control is set to its central position,
the Tremolo tablet will turn the speaker at seven Voice || Voice
revolutions per second, The Chorus tablet will turn it 1 o =
at one revolution per second. a. | —
Once either tablet is switched on, it takes several
seconds for the tremolo speaker to attain the standard я
speed. This is also true when switching to a slower
speed (Tremolo to Chorus). If one of the other tre-
molo control tablets is switched on during this speed | UPPER FLUTE SPLIT (Tremolo or Chorus)
“ change period, the speed variation will be heard i in the a { WW) |
music. oy | Tremolo Chorus
If you wish an instant tremolo or chorus sound, be split
sure to switch on that tablet well in advance of one a ° | °
of the speaker selectors. For special selections you | Ns
The Electone's special throbbing tremolo is produced by a smaller-size Natural Sound speaker that really
—spins just behind the tremolo speaker grille on the side of the cabinet.
On the BK-20A there are four tremolo selectors, located on the right side of the lower manual, each with
an on/off function They are complemented by a continuous tremolo speed contro! knob just above them.
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@ Upper Voice (Main/Rotary) : O
6 Upper Flute Split : O
This tablet feeds only Flute tones of the upper
tremolo speakers. Combined with other upper
manual tones through the main speaker it creates a a CHORUS
rich, singing blend. В a r YY
Lower |} Upper || Tremolo
can use this speed variation by switching the speaker
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This section provides eight catchy rhythms, each ong-çalled forth by a simple button.
In addition to a combined volume and balance knob, tempo control and tempo indicator light, there are.
two other switches: ordinary Start and the exclusive Yamaha Synchro-Start which begins the rhythm
accompaniment on the first beat of a measure when the first lower manual or pedal note is struck. A foot
switch fitted on the expression pedal lets you cut and restart the rhythm at any point during play.
—- Tempo Indicator Lamp Synchro-Start —
| Тетро Control
Volume Control
Rhythm Start —
— Rhythm Selectors
Balance Control
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How to use the Auto Rhythm
$ Rhythm Start |
For instant rhythm at the beginning of a selection. Push the rhythm
selector desired, get the beat set in your mind by watching the indicator
lamp, when set Synchro-Start switch on and then turn the Start switch on.
€ Synchro-Start
Select the rhythm, switch on the Synchro-Start and begin to play once
you have the beat established. The rhythm will begin as soon as you
strike a lower manual or pedal note. This switch permits you to lead in
with a rhythm-free melody at first if so desired.
SYNCHRO-S
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“using your hand. |
“quarter note letting you visually check the tempo while you adjust.
“© Volume Control
This volume is then varied during the selection by the expression pedal, just
like that of the other tones.
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® Rhythm Stop (Foot Switch) : @ | 8
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 stop it, once again to
restart. It lets you stop and restart the rhythm in the middle of a selection without
Note: After the foot switch has been used, be sure it is reset to normal after
| you 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 middie of a new number only to find the rhythm still
canceled. |
e Tempo Control
The tempo of the Auto Rhythm section can be adjusted by a continuous
contro! knob. This is best accomplished by turning on the Synchro-Start
switch. Although no sound will be produced, the indicator lamp will flash each
Use it to balance the volume of the rhythm section and the manuals.
VOLUME CONTROL
BALANCE CONTROL
VOLUME <> BALANCE
€ Balance Control _
This contro! lets you balance the low rhythm sounds, such as drums, and the high sounds (i.e. cymbals)
according to your mood and the selection. It can make a big difference even when using the same rhythm.
Turn the knob to the right to accentuate the higher (treble) sounds, to the left for lower (bass). If you
accentuate the treble sounds the rhythm becomes brighter and more cheerful. | 7
Check the playing hints for specific settings.
A A: e *3ss/Chord Lever
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e Instructions for Operation of “Auto Bass/Chord”
Your new Yamaha Electone, Model BK-20A, is equipped
with a lever marked “Auto Bass/Chord” (A) . When
used in conjunction with the “Automatic Rhythm”
(see page 13). It enables you to play just about any
combination of alternating bass-chord rhythms simply
by sustaining (holding down constantly) a chord on the
lower keyboard. From your very first, simple melody, you will be sounding like a pro. Here is all you have
to do.
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| ®) Bass Variation Button
@ Move the Auto Bass/Chord
Move the ‘’Auto Bass/Chord'’ lever toward you (A) . You have a y
now engaged the memory system and deactivated the pedals (as OFF
long as this lever is in the engaged position, you cannot play your ON rao
BK-20A as a conventional organ).
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® BASS VARIATION
€ Select one of the automatic rhythm patterns and push the corresponding button down until it clicks
and stays down © .
© Auto Rhythm Button
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Immediately to the right of the rhythm button you will find two 5 O Synchro-Start Switch
rocker type switches © . Push the “on” side (right) of the one
marked “Synchro-Start” (the one marked simply “start” is to be
used when you wish to continue hearing the automatic rhythm even
after releasing your chord on the lower keyboard). Now, be sure you
have at least one stop for each: Upper Keyboard, Lower Keyboard,
and Pedal. You are now ready to play. | |
Form one of the following type of chords on the lower manual with | \
your left hand i in any inversion:
SAR STAR N
Major Seventh |
Minor Minor Seventh
(These are the only chord types for which the memory unit can
supply the proper bass note.) Play all the notes in the chord at the
same ‘time. The unit should now be working. Adjustments may be
necessary to the “Tempo” and “Volume” knob to the left of the
“Automatic Rhythm” unit - (See page 14). a —
Adjustments may also be required to balance the relative volume of
bass, chords, and solo (upper) keyboard; do this in the same way you ет ;
would if playing conventionally. When the first chord is played, the A Faw >
unit will begin to operate on the downbeat, or first beat of the FT Lin
“measure. When the chord is released you will not hear any more РО Лу;
sound, but the unit is still operating within it's cycle. To start unit |,
оп a downbeat again, when beginning a new song, it is necessary to | +
re-set the ‘’Synchro-Start‘’ switch o. | | | f
Bass Variation Buttons :
Just below the ‘’Auto Bass/Chord” lever are three “Bass Variation Buttons” eo , marked 1 + 5 (left)
1-3-5 (center), and 1-75 (right). The numbers under the buttons correspond to the notes on the
~ musical scale in any given key and indicate what bass notes are available in the memory unit when a
‘particular button is depressed. The type of chord and the automatic rhythm used will determine the
actual note (and their sequence) that you hear.
There now follows a chart which indicates by scale step what bass notes will sound with each possible
combination (Note: for the unit to perform correctly, at {east one but not more than one button should
be down i in each section), “Bass Variation” “Automatic Rhythm”.
Auto Bass/Chord
® 8 Bass Veristion Buttons
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Bass Variation Type of Chord | “Rhythms Effected Bass Notes Played
| Ш Major — | Swing, Waltz, Bossanova 1.5
COLL Minor | | Slow rock, Rhumba
| Seventh | |
15 Minor Seventh a.
Explanation: This is the basic pattern and alternates the root (1) and fifth (5) in the bass regardless of
| rhythm chosen for type of chord. The one exception is the “jazz rock” rhythm, which never
plays anything but the root in A the bass.
Bass Variation Type of Chord Rhythms Effected Bass Notes Played
Major “| Swing, Waltz, Bossanova] 1.5
CO Oo Minor Slow rock, Rhumba 1.3.5
: Seventh Е О |
1. 3. 5 | Minor Seventh
Explanation: This selector effects only the Siow Rock, Rhumba rhythms with which it will play a root (1),
third (3), fifth (5) pattern. All other rhythms function as with the (1.5) selector. -
Bass Variation Type of Chord | Rhythms Effected Bass Notes Played
Major Swing, Waltz, Bossanova 1.5
00g Minor - | Slow Rock, Rhumba | 1.35
| Seventh “Swing, Waltz, Bossanova as
: | 1.7. 5. _Minor Seventh — [Slow Rock, Rhumba 11.7.5
Explanation: This selector effects only the Stow Rock, Rhumba rhythm when a seventh or minor seventh
В | chord is being played, with which you will hear the root (1), seventh (7), and fifth (5) bass
5 | rootes. When playing a major or minor chord the unit will perform exactly as it does with
o the second “Bass Variation” selector (1.3.5).
Remember, the Jazz Rock rhythm Is not affected by the “Bass Variation” selector, it plays
only the root (1).
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Other Controls
To Fully Enjoy Your Electone eee
Master Volume :
Determine the maximum volume obtainable by depress-
ing the expression pedal.
Headphone Jack
Plug a headphone set (optional accessory) into the jack
under the keyboard and you can play with the volume as
high as you like without disturbing anyone, even in the
middle of the night.
External Input Jack (EXT IN)
Can be used to feed any sound source through the
Electone Natural Sound Speaker radio, record player or
tape recorder. Since the volume of these sound sources
is not affected by the expression pedal, you can play
along on the Electone with any other performance.
Tone Cabinet Sockets
This socket is on the rear panel. Use it to connect a Yamaha Tone Cabinet, without any rewiring required.
Yamaha Cabinet R-608 housing Yamaha Natural Sound Speakers, will give increased tonal power.
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Record and Playback | ВЕ | | |
You can record your Electone selections through the headphone jack then play them back via the Ext.
In. jack (phone type plug required). a a
For recording your tape recorder must be equipped with a high impedance input jack, for the Electone
headphone output signal is 5Vp-p (output resistance 390 Q ). When recording, it must be remembered that
the signal to the Electone speaker will be cut off, so sound monitoring must be done via the tape recorder
monitor system.
| GENERAL Tone Cab, Socket ÓN ;
Note: > a a 1
1. Connections between the EXT. IN jack and the output jack of a tape recorder should be made with
shielded cable. Use a spare plug inserted in the EXT. IN jack.
2, Volume setting for playback will differ according to the tape recorder.
3. Adjust the volume of the Electone and the tape recorder to avoid distortion of the sound quality.
4. Make absolutely sure never to touch or otherwise interfere with the circuits or internal elements of the
Electone.
Gare of Your Électone are
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 enjoyment.
1. Be sure to use your Electone only on the correct voltage.
If any changes are required, please consult your Yamaha Electone service agent.
240 V | 117 V 117V
2. If any trouble develops, contact your service agent.
Never touch the circuits or the internal elements of the Electone yourself.
3. When you 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. It is also best to choose a location free of
humidity and currents of heated air.
6. Be careful not to strike or scratch the cabinet with a hard object.
7. 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 on it.
Do Hot Be Alarme If...
1. À note should sound the instant you turn on the switch.
This merely indicates normal operation consequent to a à surge of electricity in the main amplifier,
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2. 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.
3, 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.
4. The Electone can at times reproduce 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.
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8. Sound rattling (sympathetic vibration) occurs.
Since the Electone produces
All materials have critical resonance frequencies at which they. vibrate.
continuous tones, it is only normal that some will cause windows, shelves, etc. to rattle.
6. 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 only multiples of the integral
(base) tone, and so the instrument cannot be tuned in the same way as a piano. The same is true of other
organs, pipe and reed types.
7. Brilliance does not function with Flute sounds.
in order to reduce multiple harmonics in the high range, special resistors and condensers are used.
They unfortunately limit the Brilliance effect for flute and wood sounds, as well as pedal tones. Bril-
liance really shines for strings, ‘oboe and brass, where the harmonics are desired and therefore left
untouched.
—8. There i is a bit of noise when the rotary speaker is switched on.
This too is a mechanical noise stemming from the spinning speaker. Special mountings help keep this
sound at an absolute minimum,
Specifications
Bl KEYBOARDS
Upper Manual 44 keys f~ cq
(3% octaves)
Lower Manual 44 keys F~c;
(3% octaves)
Pedals 13 keys Ci ~C
(1 octave)
Ш TONE LEVERS
Upper Manual Flute 16°
Flute 8’
Flute 4’
Flute 2X’
Trombone 16’
Brass 8’
Oboe 8’
String 8’
String 4’
Lower Manual Flute 8’
; Flute 4'
Horn 8’
— Cello 8'
Cello 4'
Pedals Bass 16’
Bass Guitar
Ш UPPER PRESET TONE SELECTORS
Combination 1 - 3
Accordion, Piano,
Hawaiian Guitar, Banjo,
Cancel
HE EFFECT LEVERS
Vibrato
Vibrato Speed
Percussive 4' (Upper)
Percussive 2%' (Upper)
Percussive Length (Upper)
Attack Wah-Wah (Upper)
Repeat Speed (Upper)
Organ Preset Ensemble (Upper)
Lower Brush
Pedal Cymbal
Pedal Sustain
HB EFFECT CONTROLS
Brilliance
Reverb
Manual Balance (Upper/Lower)
M EFFECT SELECTOR
Glide (Foot control)
Ш TREMOLO SELECTORS
Upper Flute Split
Upper Voice (Main/Rotary)
Lower Voice (Main/Rotary)
Tremolo
Chorus
Jl AUTO RHYTHM SECTION
Rhythm Selectors
March Jazz Rock
A ERE AR SRE Ba Tk Sr RRS EEE à Ea Ts curs HE REY oe
Swing Bossanova
Slow Rock Samba
Rhythm Controls
Rhythm Start
Synchro-Start
Rhythm Stop (Foot control)
Tempo
Volume
Tone Balance
Tempo Indicator Lamp
Ш AUTO ACCOMPANIMENT SECTION
Auto Bass/Chord Lever
Bass Variation Selectors
1.5
1.3.5
1.7.5
Ш ОТНЕВ CONTROLS
Master Volume
Expression Pedal
Foot Effect Switch
Tremolo Speed Control
Power Switch
Pilot Lamp
Ш OTHER FITTINGS
Headphone Jack
External Input Jack
Tone Cabinet Sockets (Gen., Split)
Roll-top Fallboard with Lock
Music Rest
Matching Bench with Music Storage
Space
Ш NATURAL SOUND SPEAKERS
Main: JA-5101 59 x 48cm
(23% х 14%”)
Rotary: JA-1701A 16 x 23cm
(6% x 9)
Electro-control 2-speed
EB CIRCUITRY
Solid State (incl. ICs and FETs)
Main Amplifier: OCL Dual-channel
System
Total Output Power: 60 Watts (RMS)
Power Consumption: 120 Watts
Power Source: 100/110/117/125/220/
240V AC 50/60Hz
El DIMENSIONS
BK-20A BK-20AS
Width: 120cm (47”) 122cm (48”')
Depth: 56cm (22) 56em (22)
Height: 90cm (35%) 91cm (36")
E WEIGHT )
72kg (158 Ibs.) 75kg.(165 Ibs.)
E FINISH
BK-20A, BK-201A: Natural American
— walnut, oil finish
BK-20AS: Antique oak, oil
finish
Contras ORGAN
—BK-20 REGISTRATION GUIDE
As the proud owner of a new YAMAHA BK -20, may we suggest a few regis-
trations for starters so that you may exploit the versatility of this magnificent
instrument immediately. The following suggested registrations are designed to
provide you with just a few of the unlimited combinations available. Once you
become familiar with these, feel free to experiment, on your own, for registra-
tions best suited to your individual taste.
ALL SPECIAL EFFECTS are played on the 44 note UPPER manual unless
— specified. Suitable ACCOMPANIMENT registrations are included for the LOWER
ВЕ Manual.
All controls not shown in the registration SHOULD be in the OFF position.
For best results, always keep in mind the SOUND and RANGE of the effect you
are re-creating.
ABC
With the exclusive Electone ABC (Automatic Bass Chord) Any Body Can play
this DELUXE HOME SPINET from the very first day. 1. Select the rhythm —
~ 2. Turn on the ABC selector = 3. Play your chord (in any inversion) with the
left hand and your BK -20 automatically responds with rhythmic bass patterns
and left hand chord accompaniment; all tied in n with the Auto-Rhythm pattern of
your choice.
NOTE: Because individuel tastes differ, set the “BRILLIANCE” all the way
on for all registrations then reduce the intensity of your own likeness.
LOWER:
Flute 8° (3)
Flute 4 (1)
PEDAL:
Pedal Sustain - (2)
Bass (2)
EFFECT CONTROLS: |
Brilliance ..
Manual Balance ” ez.
Reverb e...
PRE-SETS: |
Combination #2
EFFECT SWITCHES:
Lower Voice Rotary
Upper Voice Rotory
Tremolo | On.
LOWER: |
Horn 8° (3)
PEDAL: | |
Pedal Sustain (1)
Boss 16 - (2)
EFFECT CONTROLS:
Brilliance “.
Manual Balance oye
Reverb e te
EFFECT SWITCHES:
Lower Voice . Rotary
- Upper Voice Main
Tremolo On
LOWER: |
Flute | 8" (3)
Flute 4' (2)
UPPER:
Flute | 16 (3)
Flute | 8' (3)
Flute 4' - (3)
PEDAL: |
Pedal Sustain | (2)
Bass 16 (2)
EFFECT CONTROLS:
Brilliance Le
Manual Balance oe
Reverb ВЕ ...
EFFECT SWITCHES:
- Lower Voice Rotory
Upper Voice Rotary
Chorus On
Le -20
POPULAR
LOWER: LOWER:
Flute 8' (3) Flute 8' (3)
Flute 4° (2) Flute 4 (1)
Cello 8’ (2) UPPER:
PEDAL: - Flute 16 (3)
Pedal Sustain (2) Flute 4 (3)
Bass 16 (3) "PEDAL: |
EFFECT CONTROLS: a Pedal Sustain (2)
Brilliance ... | | Boss 16 (2)
Manual Balance . ~~ EFFECT CONTROLS:
Reverb — | eto — Brillionce .”.
PRE-SETS: Manual Balance ” e...
“Combination - #3 - Reverb e.
— EFFECT SWITCHES: EFFECT SWITCHES: |
Lower Voice Rotory Lower Voice Rotary
Upper Voice Rotary Upper Voice Rotary
Tremolo On Tremolo On
MODERN ROCK JAZZ
LOWER: a. LOWER:
Flute 8' (3) Flute 8' (3)
Flute 4 (1) Flute 4 (1)
Cello 8" (1) Perc. Lngth 4 (3)
Perc. Length 2-2/3 (3) UPPER:
UPPER: | — Flute 16 (3)
Flute - 16 (3) PEDAL: |
Flute 4' (3) Pedal Sustain (1)
PEDAL: E. Bass 16 (2)
— Pedal Sustain (1) EFFECT CONTROLS:
Bass —. 16 (3) — Brilliance e”.
EFFECT CONTROLS: Manual Balance ” .°.
Brilliance SUES Reverb a
Manuel Balance — e”. | EFFECT SWITCHES:
Reverb ... Lower Voice Rotory
EFFECT SWITCHES: Upper Voice Main
Lower Voice Rotary Tremolo On
Upper Voice Main -
Tremolo — On
“CLASSICAL-SACRED"
LOWER: о | LOWER:
Flute | 8’ (2 Horn | 8' (3)
Flute & (1) Cello 8' (3)
Cello В’ (3) UPPER:
UPPER: Flute 4’ (3)
Flute 4' (3) Trombone 16 (3)
Brass В’ (3) — Bross 8° (3)
Oboe 8’ (3) PEDAL: |
PEDAL: — Pedal Sustain - (2)
Pedal Sustain (2) Bass: —. 16 (3)
Bass 16 (3) EFFECT CONTROLS:
EFFECT CONTROLS: —. Brilliance .”.
Brilliance ne Manual Balonce * “ne
Manual Balance en. Reverb ore
Reverb — age EFFECT SWITCHES:
EFFECT SWITCHES: Lower Voice Rotary
Upper Flute Split On | Upper Voice Rotary
Lower Voige Rotary Chorus On
Upper Voice Rotary |
Tremolo | On
LOWER:
Flute — e (3)
Flute 4 (2)
Cello — 8" (2)
Vibrato (1)
UPPER: ВЕ
Flute 16 (3)
Flute 8 (3)
Flute 4' (2)
Bross 8'. (3)
String — 8' (2)
PEDAL:
Pedal Sustain (2)
Bass 16 (3)
EFFECT CONTROLS:
Brilliance oe
Monual Balance oe
Reverb A
EFFECT SWITCHES:
Upper Flute Split On
Lower Voice Rotary
- Upper Voice — Rotary
Tremolo On
LOWER: ВЕ
Flute 8 (3)
Flute 4' (2)
Perc. Length 2-2/3 (2)
UPPER:
Flute 16 (3)
Flute 8' (3)
Flute 4 (3)
PEDAL: |
Pedal Sustain (2)
Boss 16 (3)
EFFECT CONTROLS:
Brilliance — .°.
Manual Balance ”. ore
Reverb ex.
EFFECT SWITCHES:
Lower Voice Rotary
Upper Voice Main
Tremolo On
LOWER:
Flute 4' (2)
Horn 8' (3)
Cello 8' (2)
PEDAL:
Pedal Sustain (2)
Boss 16 (3)
EFFECT CONTROLS:
Brilliance oe
Manual Balance oro
Reverb ...
PRE-SETS:
Combination #3
EFFECT SWITCHES:
Lower Voice ~~ Rotary
Upper Voice Rotary
Chorus On
MANDOLIN AND ORGAN
LOWER:
- Flute 8' (2)
Flute — 4 (1)
Horn 8’ (1)
UPPER:
Flute 8' (1)
- Flute 4 (3)
— Flute 1-2/3 (2)
String 8 (3)
String 4 (2)
. Repeat Speed (2)
PEDAL: |
Peds! Sustain (2)
Boss 16 (3)
EFFECT CONTROLS:
Brilliance 0
Manual Balance “eo
Reverb at.
EFFECT SWITCHES:
Flute Split On
Lower Voice Rotary
Upper Voice Rotary
Tremolo On
PIANO
LOWER: Co |
Flute 8' (1)
PEDAL:
Pedal Sustain . (2
Bass | 16 (1)
EFFECT CONTROLS:
Brilliance oe
Manual Balance =. .
Reverb ...
PRE-SETS:
Piono On
EFFECT SWITCHES:
Lower Voice Rotary
Upper Voice Main-
Tremolo On
SLIDE TROMBONE
LOWER:
Flute 8' (3)
Cello 4 (1).
Vibrato (1)
. UPPER: В
Trombone 16 (3)
PEDAL:
Pedal Sustain (2)
Brass 16 (3)
Brass Guitar (1)
FOOT SELECT:
Glide — On
EFFECT CONTROLS:
Brilliance oe
Manual Balance ole
Reverb > “te
EFFECT SWITCHES:
Lower Voice Rotary
Upper Voice Main
~ Tremolo On
Reverb ...
HARPSICHORD
LOWER:
— Flute — 8 (2)
Flute 4' es
UPPER: |
Oboe 8' (1)
String 8' (3)
String 4 (2)
PEDAL: |
Pedal Sustain (2)
Bass 16 (3)
Bass Guitar (1)
EFFECT CONTROLS:
Brilliance ..
Manual Balance ” .*.
Reverb af.
EFFECT SWITCHES:
Upper Flute Split On
Lower Voice — Rotary
Upper Voice Main
Tremolo — On
HAWAIIAN GUITAR
LOWER: |
Flute 8 (1)
Vibrato | (2)
PEDAL:
Pedal Sustain (2)
Boss 16 (1)
FOOT SELECT
Glide On
EFFECT CONTROLS:
Brillionce exe
Manual Balance “re
PRE-SETS: |
Hawaiian Guitar On
EFFECT SWITCHES:
Lower Voice — Rotary
Upper Voice Main
Tremolo On
MARIMBA/VIBS
LOWER:
Flute 8 (3)
Flute 4 (1)
Cello 8’. (2)
UPPER:
- Flute 8° (2)
Flute 4 (3)
Repeat Speed (2)
PEDAL: |
Pedal Sustain (2)
Bass 16 (3)
EFFECT CONTROLS:
Brillionce oe
Manual Balance 7 ,°,
Reverb a
EFFECT SWITCHES:
Lower Voice Rotary
Upper Voice Main
Tremolo On
“SPECIALTYS 8 NOYELTYS"
THEA. ENSEMBLE
LOWER: |
Flute 8’ (3)
Horn 8’ (3)
Cello 4' (2)
Vibrato (1)
UPPER: | |
Flute | 16 (3)
Flute 8' (3)
Flute 4 (3)
Trombone 16 (3)
Bross 8° (2)
Oboe В’ (3)
String 8’ (2)
PEDAL: |
Pedal Sustain (2)
Boss | 16 (3)
EFFECT CONTROLS:
Brilliance: ...
Manual Balance ‘ я
Reverb —...
EFFECT SWITCHES:
Flute Split On
Lower Voice Rotary
Upper Voice Rotary
Tremolo On
BANJO
- LOWER:
Flute 8’ (2)
Flute. A" (1)
UPPER: |
Repeat Speed 7)
PEDAL: |
Pedal Sustain | (2)
Bass 16 (2
EFFECT CONTROLS:
Brilliance “re
Manual Balance 0". |
Reverb Tepe
PRE-SETS:
Banjo On
EFFECT SWITCHES:
Lower Voice Rotery
Upper Voice Main
Tremolo — On
CHIMES
LOWER:
Flute 8 (3)
Flute 4 (1)
Percussive Length (3)
Perc. Lngth 4’ (3)
Perc. Lngth 2-2/3 (2)
UPPER: |
Flute 8' (1)
Brass 8’ (1)
PEDAL: |
Pedal Sustain | (2)
Boss 16 (3)
EFFECT CONTROLS:
Brilliance ole
Manual Balance ” .°.
Reverb a
EFFECT SWITCHES:
Upper Flute Split On
Lower Voice Rotary
Upper Voice Main
Tremalo On
ACCORDION
LOWER:
Horn 8 (2)
Cello 8' (1)
PEDAL: |
Pedal Sustain (2)
Bass 16 (2)
EFFECT CON TROLS:
Brilliance .
>
. Manual Balance TW.
-
Reverb . ...
PRE-SE TS:
Accordion On
EFFECT SWITCHES:
Lower Voice Rotary
— Upper Voice Main
WAH WAH TRUMPET
LOWER: |
Flute 8’ (3)
Flute 4d (2
UPPER:
Bross 8 (3)
PEDAL:
Pedal Sustain (2)
Bass 16 (3)
Bass Guitar (1)
EFFECT CONTROLS:
Brilliance oe
Mutual Balance ” .*.
Reverb 7 ...
EFFECT SWITCHES:
Lower Voice Rotary
Upper Voice — Main
Tremolo | On
FULL FLUTE'S
Flute 8’ (3)
Flute | 4' (2)
Cello 8" (2)
Vibrate (2)
Vibrato Speed (2)
UPPER:
Flute 16 (3)
Flute 8’ (2)
Flute 4’ (3)
Flute ‚| 2-2/3 (2)
PEDAL:
Pedal Sustain (2)
Boss 16 (3)
EFFECT CONTROLS:
Brilliance ..
Manual Balance ” “ne
Reverb | e.
EFFECT SWITCHES:
Lower Voice .. Rotary
Upper Voice Rotary
Tremolo On
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