Roland VS-2480 The Basic Mechanics of an Equalizer, , The EQ Screen Frequency-Based Tools, The Basic Mechanics of a Filter,

11—Input and Track Channel Tools

Roland VS-2480 Owner’s Manual www.rolandus.com 163

The Basic Mechanics of an Equalizer

All EQs use the same basic devices to do what they do. They all contain a:

•

frequency selector

—that allows you to select the desired frequency range by selecting

the frequency at its center, sometimes called the “center frequency.”

•

gain control

—that lets you turn the selected frequencies up or down in volume.

“Parametric” EQs also offer a Q, or bandwidth, control. This control lets you set the

width of the affected range of frequencies below and above the center frequency.

The Basic Mechanics of a Filter

There are several ways a ﬁlter can work. It can behave as a:

•

low pass ﬁlter

—that lowers the volume of all frequency content above a speciﬁed

frequency, called the “cutoff frequency.” It’s a “low pass” ﬁlter because it lets all

frequencies that are lower than the speciﬁed frequency pass through unaffected.

•

high pass ﬁlter

—that lowers the volume of all frequency content below the speciﬁed

cutoff frequency. It’s called a “high pass” ﬁlter because it lets all frequencies that

are higher than the speciﬁed frequency pass through unaffected.

•

band pass ﬁlter

—that only allows the selected band of frequencies to pass through

unaffected, lowering the level of all other frequency content below and above the

selected range of frequencies.

•

band eliminate ﬁlter

—that reduces the level of the selected range of frequencies.

The EQ Screen Frequency-Based Tools

The EQ screen provides a set of tools with which you can alter the frequency content of

the channel’s signal: a ﬁlter and four bands of equalization.

The channel signal ﬂows through the EQ screen from top to bottom in the chart above,

or left-to-right onscreen.

You can ﬁnd a frequency by turning up the EQ’s gain and sweeping through the

frequency values until you hear what you want. If you’re using a parametric EQ, lower

the Q. Once you’ve found the frequency, set the gain and Q as desired.

Here’s an EQ tip: Set the gain control so that the sound changes the way you want it to,

and then back off a little. This simple trick can really improve your EQ.

This tool: Offers these controls:

Filter conﬁguration switch, frequency selector, Q control

Low Band EQ gain control and frequency selector

Lo-Mid Band EQ gain control, frequency selector, Q control

Hi-Mid Band EQ gain control, frequency selector and Q control

High Band EQ gain control and frequency selector

G=gain control; F=frequency selector

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