Princeton SP-88 - Manual (Page 10)

Lower voice
Press the [LOWER VOICE] button. LCD
lights the lower icon and "VOICE L" . The
LCD highlights the Voice name on upper line
"144 Sound Track1".
Use the [+] & the [-] button or the DIAL and
numeric keypad to select the LOWER VOICE.
In LOWER VOICE mode, press the [VOICE]
button to switch to other voice modes ( VOICE
R1/DUAL).
Note:
The piano will check the validity of your number
input when you use the numeric keypad to
select the voice.
Sustain effect
This feature applies SUSTAIN effect to the
keyboard.
The default value when you turn on the
instrument is SUSTAIN effect OFF
Press the [SUSTAIN] button to turn on the
SUSTAIN effect. LCD lights the SUSTAIN
icon. It will apply sustain effect when playing
the keyboard. Press the [SUSTAIN] button
again to turn off the SUSTAIN effect.
When the PEDAL is assigned as SUSTAIN
PEDAL (See FUNCTION menu for details),
pressing the [SUSTAIN] button and stepping
SUSTAIN PEDAL can take out their respective
sustain effect simultaneously.
Note:
SUSTAIN via the pedal is better than the
SUSTAIN EFFECT.
LO WER VOICE
LO WER
SUSTAIN
SUSTAIN