11—Input and Track Channel Tools
Roland VS-2400CD Owner’s Manual www.RolandUS.com 157
11. IN/OUT/GR Meters
The DYN screen provides three meters that let you see what the channel’s
dynamics processor is doing to its signal at any given moment. The:
•
IN meter
—shows the signal’s original level coming into the dynamics processor.
•
OUT meter
—shows the signal’s level coming out of the dynamics processor.
•
GR (Gain Reduction) meter
—shows the amount of gain reduction being applied.
The EQ Screen
Each VS-2400CD track channel has its own EQ. When the project sampling rate is:
•
48/44.1/32 kHz
—Input Channels 1-8 each have their own EQ.
•
96/88.2/64 kHz
—Input Channels 1-4 each have their own EQ.
What Is EQ?
A sound wave is a repeating change in air pressure that your ear perceives as a sound.
The sound wave moves between its least amount of air pressure and its greatest many,
many times per second, and
very
quickly. The number of times it repeats this cycle each
second is called its “frequency.” Frequencies are measured in single cycles (called
“Hertz” or “Hz”), or in thousands of cycles (“kilohertz” or “kHz”). A low-frequency
sound wave repeats its cycle fewer times per second than a high-frequency sound wave
does. This is important because a sound wave’s frequency determines its pitch.
In fact, every sound you hear is made up of a mix of sound waves that occur so close
together in time that the ear perceives them as one single sound. Each of these sound
waves is occurring at its own frequency, of course. This means that every sound you
hear is comprised of sound waves at a variety of pitches and at different volumes, all
working together to create a single complex sound. The low-frequency sound waves
make up its bass, while the high-frequency sound waves make up its treble range.
EQ, or “equalization,” allows you to raise or lower the volume of specific sound waves
within a sound, identifying the sound waves by their frequencies. By raising or
lowering the volume of specific frequencies within a sound, you can change its
character, making it brighter or warmer, harsher or sweeter. You can lower the volume
of any frequencies you don’t like in a sound, or make other frequencies louder.
A device that performs equalization is called an “equalizer,” or simply “EQ” for short.
Some equalizers divide up a signal into specific frequency ranges, or “bands,” with a set
of controls assigned to each band. A low band EQ adjusts the levels of bass frequencies,
while a high band EQ operates on the treble content in a signal.
1.
4.
Knob labels
2.
3.
6. 7. 8.
To learn about
the CH EDIT EQ
screen’s RESET
button, see
Page 163.
5.
VS2400OMUS.book 157 ページ ２００６年２月２８日 火曜日 午前１１時１２分
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