Sony 3-097-196-14(1) Operating Instructions Manual page 80

The singer's voice may not be reduced when:
1)
 only a few instruments are playing.
 a duet is being played back.
 the source has strong echoes or chorus.
 the singer's voice deviates from the center.
 the voice on the source is singing in high
soprano or tenor.
You can also change the "KARAOKE PON"
setting by pressing KARAOKE PON
when the Karaoke Mode is turned on.
The "KARAOKE PON" setting is
automatically changed to "OFF" when you
set "VOCAL" to "ON. "
You can also change the "KEY CONTROL"
2)
setting by pressing KEY CONTROL 
reduce the key and KEY CONTROL 
increase the key when the Karaoke Mode is
turned on.
The "KEY CONTROL" setting is
automatically changed to default setting
when you change the track or title.
Depending on the disc, you may not be able
to do the above operation.
The "VOCAL" setting is automatically
3)
changed to "OFF" when you set "KARAOKE
PON" to "ON. "
For DVD VIDEOs without guide vocal, you
cannot turn on the vocal. When playing a
DVD VIDEO, the function only works for
Dolby Digital Karaoke format. For DVD
VIDEOs with 1 guide vocal recorded, you
cannot change the vocal.
Depending on the disc, you may not be able
to change the vocal.
0
GB
When playing a DVD VIDEO, the function
4)
only works for Dolby Digital Karaoke format.
For DVD VIDEOs without guide melody,
you cannot hear the guide melody even if you
set the setting to "ON. "
The highest score is reset when the system is
5)
turned off.
If you press other buttons on the remote, the
score calculating function may be canceled.

In some cases, you may not be able to use the
scoring mode.
Note
Each Karaoke setting in the table above is
automatically changed to "OFF" or to the

default setting when you:
to

to
 turn off the system.
 change the function.
 connect the headphones.
 turn off the Karaoke Mode.
 eject the disc.