NCL Phase EQ User Manual.pdf

NCL Phase EQ | User Manual

Professional Grade Equalization of the Stereo Image

Version 1.0

Introduction

NCL Phase EQ is a high quality six band stereo equalizer which

allows simultaneous left/right and mid/side processing. It is also

more than capable functioning in a more traditional EQing role.

Phase EQ has been designed to be both powerful and flexible yet

easy to use. Controls and parameters have been set up to steer

users in the right direction without being restrictive in function.

To ensure a high quality signal with a low signal to noise ratio 64

bit precision is used internally on the entire audio path. Optional

oversampling is available for increased audio fidelity.

Features at a Glance

–Windows VST

–6 EQ bands

–64 bit internal precision though out entire signal path

–Optional oversampling

–Simultaneous left/right and mid/side processing

–Optimized CPU usage

Equalization

Equalization is an important tool in audio production. It can be

used either for corrective purposes, to subtly enhance audio or for

more drastic creative uses.

One thing to remember is a little can go a long way. EQ is a very

powerful tool and applying too much can be a quick way to ruin

your tracks.

Below is a third party article on equalization which may be of help

to those new to equalization or as a reference for the more

experienced:

http://www.soundonsound.com/sos/Aug01/articles/usingeq.asp

Sound on Sound.

Equalization as a Stereo Effect

Left/Right Processing:

Independent EQing of the right and left channels can be used for

different purposes:

Boosting and cutting different frequencies in the left and right

channel can be used as a form of stereo widening or enhancement.

This is probably best done with wide curves and relatively low

gain.

Applied to a mix or sub-mix. EQing of specific frequencies can be

used to move different elements around in the stereo field. For

example by playing with the high frequencies it may be possible

to reposition the high hats in the stereo field of a complete drum

mix.

Mid/Side Processing:

Audio can be encoded so that instead of a standard left and right

channel it is represented as a mid and side channel. The mid

channel contains the mono signal and the side channel contains the

difference between the left and right channel or the stereo

information. This is cool as it provides easy manipulation of the

stereo width.

Some possible uses of mid/side EQ are:

Focusing the Bass. Applying a high pass filter to the side channel

ensures that the bass will only contain mono information. Vinyl

recordings with wide stereo information in the bass can cause the

needle to skip. This technique is therefore useful when mastering

for vinyl.

Stereo enhancement. An EQ boost on the side channel will

increase the stereo width of the affected frequencies. Cutting the

mid channel will also increase the perceived stereo width.

User Interface

High Pass and Low Pass Controls:

HP indicates the High Pass Filter and LP the

Low Pass. These filters have three controls

each: Freq – Frequency. Q or resonance and

Mode .

Freq:

This controls the cut off frequency of the filter.

For the High Pass Filter Only frequencies above

this will pass through the filter. The High Pass

Has a range of four octaves from 20 to 320 Hz. The Low Pass

Filter only allows frequencies below the cut off frequency to pass

through. The Low Pass also has a range of four octaves, but from

1250 Hz to 20 kHz.

Q controls the slope and resonance of the filter. Increasing the dial

above the half way position will start to add a resonant peak

around the cut off frequency. The High and Low Pass Q controls

have a range from 0.1 to 1.7.

Mode:

This control determines how the stereo image will be equalized.

The High and Low Pass modes are Bypass (--), Left and Right (L

+ R), Left, Right, Mid and Side. Bypass: disables the band, also

freeing CPU time. L + R: Both the left and right channel will be

filtered. Left, Right, Mid and Side: Only the selected channel

will be processed.

Please note that the mode control for the HP and LP filters works quite

differently than for the other filter types.

Peak Filters:

Phase EQ has two Peak filters. They have

five controls each. Freq - frequency, Q -

bandwidth or resonance, Gain , Mode and

Position .

Freq:

Boosting a peak filter creates a bell like

curve centered at the frequency specified

by this control. Both peak filters have a five

octave range. The first filter (on the left)

covers the low to upper mid frequencies -

80 to 2560 Hz. The second filter covers the

low mid to high frequencies – 375 to 12000

Hz.

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