ALLEN & HEATH GLD User's Guide download pdf (Page 19)

Qu-16 User Guide 19 AP9031 iss.2

Mix processing

The mix masters provide EQ, Compressor, FX Insert

capability and output Delay.

Insert switches an internal FX in or out if one has been

patched into the mix. The button is disabled when the

insert is not patched. The FX is inserted at the start of

the processing before the EQ.

Use the FX / Back panel screen to choose and assign

one of the 4 internal FX as an Insert into a mix.

Delay up to 170ms can be added to each mix output.

This is typically used to time align the PA to the

acoustic sound from the instruments on stage, or to

align fill loudspeakers to the main PA. Allow 1ms per

foot distance as a starting point.

GEQ (graphic equaliser)

A GEQ is provided on each of the 4 mono mixes and

the main LR mix as these are likely to feed stage

monitors and PA speakers where traditional graphic

equalisation is popular. A PEQ is provided on each of

the 3 stereo mixes where more precise parametric

equalisation may be preferred for in-ear and other

sends.

The Graphic Equaliser allows tonal adjustment of the

overall mix sound. It splits the 20Hz to 20kHz audio

frequency range into 28 standard 1/3 octave bands

from 31.5Hz to 16kHz allowing +/-12dB cut or boost.

Touch the screen In button to switch the GEQ in or

out. Touch a slider to highlight it and use the screen

rotary to cut or boost its frequency. This affects a

small range of frequencies 1/3 octave wide centred on

the frequency marked below the slider. The position of

the sliders shows the approximate shape of the

resulting frequency response curve.

Press the GEQ Fader Flip key to view and adjust the

GEQ on the faders while a mono or the LR mix is

selected. The screen highlights the active range of

frequencies. Press the switch again to change range

or return to normal mix mode.

The faders toggle between the lower (31.5Hz to 1kHz)

and higher (500Hz to 16kHz) ranges of frequencies.

The frequencies are shown on screen and marked on

the panel above the faders.

The fader strip Sel key turns on when the slider is at

0dB mid (flat) position while in fader flip mode. Press a

Sel key to return a slider to 0dB.

It is better to cut rather than boost frequencies when

tuning speakers using the GEQ.

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ALLEN & HEATH GLD User's Guide Page 19

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