Yamaha Electone EL-57 Owner's Manual page 45

Set the tempo.
TEMPO
1 TEMPO Dial
For adjusting the speed of the rhythm. Turn the dial clockwise
to increase the tempo, and counter-clock wise to decrease it.
2 TEMPO Display (BAR/BEAT Indicator)
Shows the current tempo. (Displayed values are given in beats
per minute, just as on a conventional metronome.) The tempo
range is 40 to 240 beats per minute.
When the rhythm begins playing, the TEMPO display changes
function to a Bar/Beat indicator.
2) To use the Fill In patterns:
Fill In patterns are designed to be used as temporary and regular
rhythmic breaks to spice up a repeating rhythm. Like the regular
rhythms, all Fill In patterns have been designed to perfectly match the
bass and chord parts of the Automatic Accompaniment feature.
Select and play a rhythm.
As you play the Electone along with the rhythm, occasionally
press the FILL IN button.
For best results, press the FILL IN button just at the beginning
or the first beat of a measure.
INTRO.
ENDING
BAR/BEAT
TEMPO
1
BAR/BEAT
TEMPO
SYNCHRO START
START
FILL IN
2
NOTE:
When you turn the TEMPO Dial even
while the rhythm is playing, the display
momentarily changes to show the current
tempo.
NOTE:
USING A FILL IN FOR THE START OF
A SONG:
Fill In patterns can also be used as
introductions; simply press the FILL IN
button before starting the rhythm with
the START or SYNCHRO START buttons.
NOTE:
PLAYING PARTIAL FILL IN PATTERNS:
You can also start Fill In patterns within a
bar, in order to play only the final one or
two beats of the Fill In pattern and create
additional rhythmic interest. Since the
Fill In feature is very sensitive to bar/beat
boundaries, you should be very careful to
"play" the FILL IN button precisely on
(or just slightly before) the beat that you
want the Fill In pattern to begin.
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