Yamaha Electone EL-900 Owner's Manual page 133

To replace the instrument:
1. Select the track using the Rhythm Track control above.
2. Simultaneously hold down the Data Control button corresponding
to CHANGE and press the key on the Upper or Lower keyboard
that corresponds to the instrument you want to use.
3 CLEAR
The Clear function is used to erase an instrument from the rhythm.
All instances of the selected instrument, irrespective of which tracks
they occupy, will be erased from the pattern.
There are two ways to use Clear:
[1] While holding down the Data Control button corresponding
to CLEAR, press the key on the keyboard corresponding to the
instrument you wish to erase. (A short ﾒbeepﾓ sound indicates
that the instrument has been erased.)
You can erase all of the sounds on all recorded tracks of the pattern
by holding down the Data Control button corresponding to
CLEAR and simultaneously pressing the lowest key (C1) on the
Lower keyboard.
Be careful not to do this inadvertently since all sounds will be
instantly and permanently erased.
[2] Press, then release the Data Control button corresponding to
CLEAR. The following display appears, prompting confirmation
of the operation:
Select [Clear] to execute the operation.
The message "Completed!!" briefly
appears.
4
Then, use the step forward and step reverse controls to advance or
reverse the rhythm clock to the point at which you wish to enter the
percussion sound.
Select [Cancel] to abort the operation
returning to the previous display.
9
133