ALLEN & HEATH XONE:62 User's Guide download pdf (Page 24)

24 XONE:62 User Guide

Filter Type Select

The filters are ‘state variable’. This means that they

provide three simultaneous filter types, high-pass,

band-pass and low-pass. Three large illuminated

switches select which type is active. You can press

any combination together to create different

response types such as ‘notch’ and an interesting

‘all-pass’ effect. The switches are ‘soft switched’ for

live performance, meaning that the audio signal is

ramped between filter states to prevent audible

clicks. The selected type affects both X and Y

filters.

Note that the last selected type is lost when power

is removed from the console. The LPF is always

selected when power is applied.

The graphs below show the effect on the audio

frequency response for the three filter types. The

range of sweep from low to high frequency is shown

together with the effect of adjusting RESONANCE

(one frequency with several resonance settings

shown).

The vertical scale shows the amount of cut or boost

around the normal 0dB operating level. The

horizontal scale shows the change in frequency

from low (bass) to high (treble).

11 HPF. Press this switch to select the high-pass

filter. Frequencies below the cut-off point are

removed. The cut-off point is adjusted using the

large VCF control. At minimum little effect is heard

as only sub bass frequencies are removed. Sweep

clockwise to gradually remove the bass line followed

by the higher frequencies. The highest frequency is

limited to 10kHz as little useful material is heard

beyond this.

☺ Tip. Try switching the HPF in with VCF set fully

clockwise at highest frequency, then gradually

sweeping the frequency back to minimum. This can

create an atmosphere of anticipation as the dance

floor awaits the power of the beat to kick in.

12 BPF. Press this switch to select the band-

pass filter. Frequencies above and below the cut-off

point are removed leaving just a narrow band of

sound. Sweep VCF around its mid position to affect

lead sounds such as keyboard and vocals.

☺ Tip. Try picking out individual sounds such as

vocals and mixing them into the beat and bass of

the opposite track to create a whole new mix. Add a

little resonance to the BPF to lift the sound out of

the mix.

13 LPF. Press this switch to select the low-pass

filter. Frequencies above the cut-off point are

removed. The cut-off point is adjusted using the

VCF control. At minimum only sub bass remains.

Sweep clockwise to gradually introduce the bass

line followed by higher frequencies into the mix.

☺ Tip. Try sweeping the LPF back to a low

setting to keep the beat and energy going while

talking over the mix. Try also punching in the filter

and sweeping it back from high to low in time with

the beat. Punch it out at the start of the next bar.

In addition to the three basic filter types you can

experiment with new effects by selecting

combinations of switches together. Press and

release the switches together. They illuminate to

show which filter types are active. For example:

HPF+LPF = NOTCH. Used with low settings of

RESONANCE you get a phasing effect. Try

sweeping the effect across the frequency range.

HPF+BPF+LPF = ALL PASS. A surprising effect

considering that all frequencies are ‘passed’.

However, the filter type interaction around the cut-

off point creates an interesting effect that varies

from subtle to dramatic depending on the

RESONANCE setting.

☺ Tip. Take some time to experiment with the

filters before ‘going live’

10k20 1kHz100 20k

0dB

+10

+15

+20

-5

-10

-15

-20

LO-PASS FILTER

BAND-PASS FILTER

10k20 1kHz100 20k

0dB

+10

+15

+20

-5

-10

-15

-20

10k20 1kHz100 20k

0dB

+10

+15

+20

-5

-10

-15

-20

HI-PASS FILTER

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ALLEN & HEATH XONE:62 User's Guide Page 24

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