Chapter 6. Sound Settings
46
from the list and the maximum volume will be limited to the selected value all over the
system.
6.4. Treble
This setting emphasises or suppresses the higher (treble) frequencies in the sound. A
value of 0 dB means that treble sounds are unaltered (flat response).
6.5. 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 volume
of the right channel relative to the left.
6.6. Channels
A stereo audio signal consists of two channels, left and right. The
Channels
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:
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
Stereo Width
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.
6.7. Stereo Width
Stereo width allows you to manually specify the effect that is applied when the
Chan-
nels
setting is set to “custom”. All values below 100% will progressively mix the contents
of one channel into the other. This has the effect of gradually centering the stereo im-
age, until you have monophonic sound at 0%. Values above 100% will progressively
The Rockbox manual
(version 3.14)
Olympus m:robe 100
