Yamaha Electone BK-20A User manual

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Page
Introduction
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1
This
is
Your
Yamaha
Electone
BK-20A
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2
Keyboards
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3
The
Compass
of
the
Electone
BK-20A
............
——
-4
Tone
Levers
.........
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—————
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Tone
Levers
Registration...
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Upper
Preset
Tones
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10
Effect
Controls
and
Selectors
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11
Sound-in-Motion
Tiamolo
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12
Auto
Rhythm
Section
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13
Auto
Basp/
Chord
System
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15
To
Fully
Enjoy
Your
Electone
---
MIHI
18
Care
of
Your
Electone
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arse
Los
sputo
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Dre
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~...20
Do
Not
Be
Alarmed
If
«HR
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21
Specifications
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Congratulations
upon
your
selection
of
this
Yamaha
Electone.
It
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.

This
is
your
Yamaha
Elecisi
Q Fite 16'
Percussive 235" (DI (B. Fiute e
Percussive
4'
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Fiute
4’
Percussive Length © € Fiute 235"
Vibrato Speed @ (D Trombone 16"
Vibrato @ Q Brass 8' Master Volume Q)
Cello
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Rhythm
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Pedals (D
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Manual
Balance
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Brilliance
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Switc
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Preset
Tone
Selectors
Expression
Pedal
()
QD Foot Switch Selectors
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Bass
Guitar
:
Lower
Manua!
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Bass
16’
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Upper
Manual
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Pedal
Sustain
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Keyboards
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 — (3X'octaves)
Lower Manual 44keys — (3X'octaves)
Pedals 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
MANUAL
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A |
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PEDALS

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Lower manual
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: : Actual pedal notes sound one octave lower
than they are written in the musical score.
This is standard procedure for bass instru-
ments.

Tone Levers
A Rer PRP ioe RE SE a EA RS A ay TNS Seer ng a aii oo OTE i t Ro Seer ae te REST n)
To the left of both upper and lower manuals are a series of tone levers which control 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 BRASS OBOE ^^ STRING
16 g 4 D 6 g 8 8"
BRUSH — FLUTE . — FLUTE HORN
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Exclusive
Yamaha
Tone
Lever
System
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Each lever provides two methods of contro!. 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 manual's overall 1
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 24" tones one octave and a fifth above
the fundamental. -
ONE OCTAVE
AND A FIFTH
ABOVE
FUNDAMENTAL
ONE octave fF a ONE OCTAVE
BELOW 4 4 ABOVE
FUNDAMENTAL 4 "| FUNDAMENTAL
For example, if you press middle C, corresponding to the keys in the chart below will sound be produced.
_ Depressing MIDDLE C
E
1.
4 ————-—————
“pos
ln other words. the 16’ lever extends the lower manual a full octave as shown bv the dotted line in the

Tong
Levers
Registration
senema-
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 shouid 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,
(E A
easy settings.
© UPPER
FLUTE FLUTE FLUTE TROMBONE BASS . OBOE STRING STRING
8 4 224 ] d :
kani ; CYMBAL SUSTAIN er BASSGUITAR=
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~———————
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SP
Effect Levers
These
levers
contro!
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
contro!
and
click-stop
settings.
€ Upper Percussive: 0006
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
2X'
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: DO
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.
© Repeat Speed: ©
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.