Allen&Heath XONE DB4 - Manual (Page 12)

Allen & Heath 12 XONE:DB4 User Guide
FILTERS
2
3
1
The XONE:DB4 is equipped with a dual, swept filter system, that emulates the analogue filters that
have been a key feature on most XONE products. The filters can be used as a mix tool, or to create
dynamic effects. On initial power up, or after a mixer reset, the filters always default to Low-Pass, but
any combination of the three filters types can be achieved by simultaneously pressing the filter type
buttons. From Version 2 firmware the current filter selection is stored when the mixer is powered
OFF, and recalled when it is switched back on. The frequency sweep control sets the cut-off point of
the filter, and the resonance alters the Q. A flat frequency response is achieved when the Frequency
Sweep control is fully clockwise (LPF) or fully anticlockwise (HPF), with the Resonance control set to
its midpoint.
4
5
6
Resonance Control
This reproduces the classic analogue VCF sound of adjusting the
level of negative feedback. The control ranges from ‘mild’
producing a very subtle effect, to ‘wild’, producing a dramatic
swept peaked resonant effect.
1
HPF Button
Turns on the high pass (bass cut) filter slope.
The button will illuminate when selected.
2
BPF Button
Turns on the band pass (bell shaped) filter slope.
The button will illuminate when selected.
3
LPF Button
Turns on the low pass (treble cut) filter slope.
The button will illuminate when selected.
4
Frequency Sweep Control
This control sets the cut-off frequency of the filter. It ranges from
very low frequency (20Hz) to very high (20kHz).
5
Filter On Switch
Switches the filter on and off. The button will illuminate when selected.
6
ADVANCED BUTTON MODES
Any frequency band select button ([2], [3] and [4]) can be momentarily selected along with the currently
active band. To do this, hold down the button of the band that is currently active and then press the
button of the band to be momentarily selected. Multiple filter bands may be selected by pressing the
band buttons simultaneously. Releasing the band buttons simultaneously will store the selection.
To turn on the filter, press the relevant FILTER ON switch
[6]. This switch has two modes of operation,
latching and momentary. To latch the switch ON, tap once. To briefly switch ON a filter, press and hold
the button; the filter will turn off on release. This function also works the other way, so if a filter is ON,
pressing and holding the button will turn the filter off until the button is released.