Yamaha PSR-12 Product Manual page 7

2. Adjust the volume
Slide the MASTER VOLUME
three-quarters of the way towards Max. to
set the volume level.
3. Press the DEMONSTRATION
START/STOP selector
First, "Toy Symphony" will start to play as
soon as you press this selector, followed
by the other pieces of music.
The eight pieces of music will be
repeated automatically.
To stop the music, press the
DEMONSTRATION START/STOP
selector again.
To playback a particular piece of music,
first press the key that corresponds to
the music you want to hear, then press
the DEMONSTRATION START/STOP
selector. The music will be played back
once only.
You can change the programmed voice,
rhythm and tempo as you like.
However, you shouldn't switch from a
4-Beat to a 3-Beat rhythm, or vice
versa, since the beats do not match.
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