Kawai CN390 Owner's Manual page 50

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RASING ONG ATA
This function allows you to erase any song and part you do not want to
listen to.
OPERATION While holding down both the REC and PLAY/STOP button, press
the SOUND SELECT button labeled with the song number and the
part number you wish to erase. Releasing the buttons will erase
the desired song data.
ERASING ALL THE SONGS
To erase all the songs at once, first turn off the power then turn it back on
again while holding down both the REC and PLAY/STOP buttons.
50 KAWAI DIGITAL PIANO CN390