User's Manual

16
YDP-164, YDP-144, YDP-S54 Owner’s Manual
Playing the Piano
With this function, the sound quality of this instrument is automatically adjusted
and controlled according to the overall volume. Even when the volume is low,
this lets you hear both low sounds and high sounds clearly.
To tu rn on IAC:
While holding down [DEMO/SONG] and [PIANO/VOICE] simultaneously,
press the C#2 key.
To turn off IAC:
While holding down [DEMO/SONG] and [PIANO/VOICE] simultaneously,
press the C2 key.
To adjust IAC Depth:
While holding down [DEMO/SONG] and [PIANO/VOICE] simultaneously,
press the D2 key to decrease the value, or the E2 key to increase.
The higher the value, the more clearly that low and high sounds are heard at
lower volume levels.
Intelligent Acoustic Control (IAC)
Default setting:
On
C#2Lowest key
C2
Lowest key
Lowest key
D2 (Depth -1)
E2 (Depth +1)
D#2 (Default)
Setting range:
-3 – +3
Default setting:
0 (D#2)