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ML3000 User Guide 21
EQUALISER. The channel equaliser provides
adjustment of 4 independent frequency bands.
Each has cut/boost and the mids have frequency
sweep controls. HF and LF are shelving. HM and
LM are peak/dip to affect the chosen band of
frequencies.
HF The high frequency band has a shelving
response that cuts or boosts the higher (treble)
frequencies by up to 15dB. The shelf turning point
frequency is 12kHz.
HM The higher mid band has a bell shaped
peak/dip response that cuts or boosts the higher
mid frequencies by up to 15dB. The centre
frequency can be adjusted from 500Hz to 15kHz.
LM The lower mid band is similar to the high mid
but provides adjustment from 35Hz to 1kHz.
LF The low frequency band has a shelving
response that cuts or boosts the lower (bass)
frequencies by up to 15dB. The shelf turning point
frequency is 60Hz.
EQ IN. Switches the equaliser in or out.
Using the Equaliser
The channel equaliser can be used to creatively
enhance or correctively improve the tonal quality of
the sound. For example, to brighten up a guitar so
that it stands out in the mix, to cut back the
boominess of the kick drum while enhancing the
snap of the beater, or to notch out a ringing
frequency associated with the position of a mic on
stage to help increase its gain before feedback.
Before using the equaliser make sure you choose
the best microphones for the job and place them to
capture each sound accurately. Check and adjust
the channel HPF to filter out unwanted low
frequencies where necessary. If you are working
with the full frequency range make sure the HPF
sweep control is set fully anti-clockwise to turn it off.
Start with the EQ set flat and apply only as much
boost or cut as is needed. The HM and LM bands
have an extended frequency range to overlap the
HF and LF shelves. This allows tighter and more
precise two point control of bass and treble where
needed.
Use the in/out switch to compare the original and
equalised sound. The equaliser has a flat response
and therefore no effect when all the cut/boost
controls are set to their centre detented position.
10k1kHz100 30k
-15
-20
10
-10
-5
0dB
+5
+10
+15
+20
HF EQ
10k1kHz100 30k10
LF EQ
10k1kHz100 30k10
500Hz 15kHz
HM EQ
10k1kHz100 30k10
35Hz 1kHz
LM EQ
-15
-20
-10
-5
0dB
+5
+10
+15
+20
-15
-20
-10
-5
0dB
+5
+10
+15
+20
-15
-20
-10
-5
0dB
+5
+10
+15
+20
21


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