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Chapter 14 Audio
Karaoke
This effect filters out the lead vocal from a musical number so that it can be used, for example, for
karaoke performances. Depending on how effective the filtering is, a vocal piece can also be used as
instrumental background music for videos. The principle behind this effect is the fact that in vocal num-
bers, the lead vocal is usually is present on the right and left channels equally. This plugin compares the
two channels and removes identical components. There is no way of knowing ahead of time whether a
particular recording will be suitable (optimal or less so).
 Vo lu m e -
Lets you correct the change in volume that is a by-product of the Karaoke effect when it filters out
the vocals. If the volume is too low, move the slider to the right.
Reverb
This effect determines sound character by simulating the rooms in which tones/sounds/noises are cre-
ated and perceived. The reflection of soundwaves (commonly referred to as echo) plays an important
part. The size of the room and the nature of the reflecting surfaces create differences in the direct percep-
tion of the sound source and in the delayed perception altered by reflection.
A number of room simulations are available.
The following parameters allow you to configure individual acoustic spaces (Tip: Start with a similar
preset):
 Initial Delay -
This parameter determines the starting time for the first “early reflection”, i.e. how the sound is
reflected off the walls in the simulated room. Values range from 0 to 500 milliseconds. The lower
the value, the earlier this initial reflection is audible.
 Room Size -
This setting determines the “size” of the simulated room and, therefore, the depth of the rever-
beration. Values range from 1 to 30. The higher the specified value, the larger the simulated rever-
beration space.
 Damping -
This parameter serves to attenuate the high frequencies in the reverberation in order to generate a
softer, warmer sound. The higher the value, the more the high frequencies are attenuated.
 Duration -
This parameter determines the duration of the reverb effect.