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Digital Audio Processor with Room Control Crestron C2N-DAP8RC
72 • Digital Audio Processor with Room Control: C2N-DAP8RC Operations Guide - DOC. 8187A
Parametric Equalizer Control Signals (continued)
SIGNAL TYPE
(D/A, I/O)*
FUNCTION
Filter_Mode
Filter_Mode_FB
AI
AO
Sets the type of filter or EQ, as follows:
Filter_Mode
Value
Off (no EQ) 1
EQ Filter - boosts or attenuates
specified frequency, as in a
graphic equalizer band.
2
Bass Shelf - uniformly boosts or
attenuates all frequencies below
the Filter_Freq level. The amount
of modification is given by
Filter_Gain.
3
Treble Shelf - uniformly boosts or
attenuates all frequencies above
the Filter_Freq level. The amount
of modification is given by
Filter_Gain.
4
Low Pass - filters out all audio
above the Filter_Freq level.
5
High Pass - filters out all audio
below the Filter_Freq level.
6
Filter_Freq
Filter_Freq_FB
AI
AO
Selects the center frequency. Valid values range
from 20 (20 Hz) to 20000 (20 kHz).
Filter_BW
Filter_BW_FB
AI
AO
Controls the bandwidth of a given filter, and is
expressed in octaves. Although ‘bandwidth’
applies only to the EQ filters, the CN2-DAP8RC
can derive Q or slope from bandwidth to control
the sharpness of high pass, low pass, and shelf
filters. Use of uniform units permits clean
transitions between filter types, such as from EQ
filter to lowpass.
For EQ, lowpass, and highpass, bandwidths in
the range of 0.02 to 2.0 are appropriate. For the
shelf filters, a range of 1.0 to 3.0 is appropriate.
Smaller values represent a narrow band of boost
or attenuation; larger ones represent a wide band
of boost or attenuation.
Filter_Gain
Filter_Gain_FB
AI
AO
Boosts or attenuates the center frequency, or
with shelving filters, all frequencies above or
below the center frequency. Valid values range
from -240 (-24 dB) to +240 (+24 dB).
Preset#
Preset#_FB
AI
AO
The Preset# input defines the preset to be stored
or recalled; thus valid values range from 1
through 5, or 0 for no preset. The Preset#_FB
output reports the current preset.
*Signal types are shown as DI (digital input), DO (digital output), AI (analog input), or AO (analog
output). The filter feedback signals report the state of the filter defined by Filter_Channel and Filter_Band.