Yamaha P-90 Owner's Manual page 17

Starting playback automatically as you start playing the keyboard
(Synchro Start)
When the Synchro Start function is engaged, play-
back of the selected preset song will begin automati-
cally as soon as you start playing on the keyboard.
To engage the Synchro Start function press the
SONG [START/STOP]
part button for the ON part. A dot will appear in the
lower right corner of the display.
(Repeat the previous operation to disengage the Synchro Start function.)
Playback will then start as soon as you begin playing on the keyboard.
3.
Stop playback.
When playback is complete, it automatically stops and the P-90 locates the top
of the song. If you wish to stop playback in the middle of a song, press the
SONG[START/STOP]
button while holding the
button.
If you hold a track button that is
OFF while pressing the SONG
[START/STOP] button, that
song number
track will be turned ON and the
synchro start mark
unit will engage Synchro Start
mode.
Both parts are automatically
turned ON whenever a new
song is selected.
Listening to 50 Piano Preset Songs
P-90
17