66
Using the audio effects
■
Isolator
This cuts the level independently for separate frequency bands, letting you eliminate unwanted sounds.
For example, you can use it to extract a desired instrument (such as drums or vocals) from a phrase taken
from an audio CD.
*
On a conventional equalizer, there will still be some sound even if the gain of each frequency band is lowered
completely, but on an isolator no sound at all will remain.
fig.4-13
■
Center Canceller
When a stereo source such as an audio CD is input, this will eliminate the sounds that are localized at the
center, such as vocals and bass. This is useful when you want to process a song from an audio CD to
create a collection of phrases.
*
For some sources, you may not be able to obtain the desired result; for example, sounds other than the one you want
to eliminate may also be lost. Also, this may not work correctly on musical sources with deep reverb, or if the sound
you want to eliminate is not localized at the center.
fig.4-14
■
Lo-Fi Processor
This creates a “
lo-fi sound
” by lowering the sample rate or reducing the number of bits.
*
Raising the input level may cause the output level to suddenly become very loud. Before you adjust the lo-fi
processor, it is best to turn down the volume to prevent speaker damage, and then adjust the level appropriately
while listening to the result.
fig.4-15
■
Surround RV (Surround Reverb)
This is a reverb effect that uses Roland’s RSS technology to provide multi-speaker surround output (four
speakers). It expands the sound field for normal listening.
fig.4-16
Conventional stereo playback reproduces the sound from two speakers placed in front, at the left and
right. In contrast, a
surround function
uses speakers placed in back as well as in front to create a sound
field that extends left to right and also front to back. You will need the appropriate number of speakers
(four) for surround playback.
*
It is not possible to place (pan) or move (fly) an audio source in the surround sound field.
Input L
Input R
Output L
Output R
Noise
Suppressor
Comp/
Limiter
Pitch
Shifter
Isolator
Input L
Input R
Output L
Output R
Noise
Suppressor
Center
Canceller
3-Band
Equalizer
Input L
Input R
Output L
Output R
Noise
Suppressor
Noise
Generator
Lo-Fi
Processor
Input L
Input R
Rear Output L
Rear Output R
Front Output L
Front Output R
Noise
Suppressor
Surround
Reverb
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