Extron electronics DMP 128 User Manual page 39

Once inserted, double-click the processor block to change parameters of the filter. After the
first filter is inserted, up to four additional filters can be added to the filter block using the
dialog box. Select the desired filters from the following list using the drop-down boxes:
• High pass filter — A high pass filter passes a band of frequencies extending from a
specified cutoff frequency (greater than zero) up toward the high end of the frequency
spectrum. All frequencies above the specified cutoff frequency are allowed to pass,
while all frequencies below are attenuated.
The default cutoff is 100 Hz.
Low pass filter — A low pass filter passes a band of frequencies extending from a
•
specified cutoff frequency (less than infinite) towards the lower end of the frequency
spectrum. All frequencies below the specified frequency are allowed to pass, while all
frequencies above are attenuated.
The default cutoff is 10 kHz.
Bass and treble filters — Also known as shelving or tone controls, the separate bass
•
and treble filters cut or boost gain linearly above or below a specific frequency, with the
end-band shape giving the visual appearance of a shelf. The bass default frequency is
100 Hz and the treble default is 8 kHz.
• Parametric equalizer filter — The parametric filter is a frequency equalizer that
offers control of all parameters, including amplitude (the amount of gain/boost or gain
reduction/cut applied), center frequency (frequency), and range of affected frequencies
(Q) around the center frequency.
Figure 25. Filter Block Dialog Box
Open the filter block dialog box to insert additional filters. Select a filter type from the drop-
down filter selection list. All filter parameters are modified using the Filter block dialog box.
Each filter loads with all applicable parameters displayed to the right of each filter selection.
DMP 128 • Software Control 33