C
HAPTER
6. S
OUND
S
ETTINGS
47
6.3 Treble
This setting emphasises the higher (treble) frequencies in the sound. A value of 0 dB
means that treble sounds are unaltered (flat response). The minimum setting is 0 dB
and the maximum is 6 dB.
6.4 Balance
This setting controls the balance between the left and right channels. The default, 0,
means that the left and right outputs are equal in volume. Negative numbers increase
the volume of the left channel relative to the right, positive numbers increase the vol-
ume of the right channel relative to the left.
6.5 Channels
A stereo audio signal consists of two channels, left and right. The C
HANNELS
setting
determines if these channels are to be combined in any way, and if so, in what manner
they will be combined. Available options are:
Setting
Description
Stereo
Leave the audio signal unmodified.
Mono
Combine both channels and send the resulting signal to both stereo
channels, resulting in a monophonic output.
Custom
Allows you to manually specify a stereo width with the S
TEREO
W
IDTH
setting described later in this chapter.
Mono Left
Plays the left channel in both stereo channels.
Mono Right
Plays the right channel in both stereo channels.
Karaoke
Removes all sound that is common to both channels. Since most music
is recorded with vocals being equally present in both channels to make
the singer sound centrally placed, this often (but not always) has the
effect of removing the voice track from a song. This setting also very
often has other undesirable effects on the sound.
6.6 Stereo Width
Stereo width allows you to manually specify the effect that is applied when the C
HAN
-
NELS
setting is set to “custom”. All values below 100% will progressively mix the con-
tents of one channel into the other. This has the effect of gradually centering the stereo
image, until you have monophonic sound at 0%. Values above 100% will progressively
remove components in one channel that is also present in the other. This has the effect
of widening the stereo field. A value of 100% will leave the stereo field unaltered.
T
HE
R
OCKBOX MANUAL
I
RIVER
H3
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