Yamaha Electone BK-20A Manual del usuario - Página 18
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Immediately to the right of the rhythm button you will find two
rocker type switches
(D) .
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 in any inversion:
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).
Adjustments may also be required to balance the relative volume of
bass, chords, and solo (upper) keyboard; do this in the same way you
would if playing conventionally.
When the first chord is played, the
unit will begin to operate on the downbeat, or first beat of the
measure.
When the chord is released you will not hear any more
sound, but the unit is stil! operating within it's cycle.
To start unit
on a downbeat again, when beginning a new song, it is necessary to
re-set the "Synchro-Start" switch © .
Bass Variation Buttons :
(D Synchro-Start Switch
Just below the "Auto Bass/Chord" lever are three "Bass Variation Buttons" (B) , marked 1 - 5 (left)
1-3-5
(center), and 1-7-5
(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 least one but not more than one button should
be down in each section), "Bass Variation" "Automatic Rhythm".
Auto Bass/Chord