Polycom Vortex EF2241 Programming Manual page 97

This command sets or queries all of the parameters for the parametric equalizer (EQ) filters on input
channels 1-4, A-D, and T . Each channel has five bands of parametric EQ that can be independently
controlled.
The input parametric EQ filter parameters can be set individually via the PEQIT, PEQIF, PEQIB, PEQIG,
PEQIS, and commands. The output parametric EQ filter parameters can be set simultaneously via the
PEQIE
command or individually with the PEQOT, PEQOF, PEQOB, PEQOG, PEQOS, and
PEQOA
When using this command, you must specify all of the following parameters.
Description Value Range
Channel 1-4, A-D, T
Band 1-5
Filter Type 1-5
Frequency 20 - 20000
Bandwidth 5 - 200
Gain -20 - 20
1 - 1.2 * Gain for shelving filters, 12 or 24 for Linkwitz-Riley
Slope
filters
Enable 0 - 1
The paramters are specified in the order shown and are separated by commas. The wildcard character, *,
may not be used for any of the parameters listed above. If an attempt is made to set one of the parameters
outside the valid range, the command will fail and return an error message of ERROR#002.
Not all of the parameters are valid for each of the filter types. The following table shows which parameters
are used in each of the filter types.
Filter Type
Parametric (1)
Low Shelf (2)
High Shelf (3)
Lowpass (4)
Highpass (5)
Linkwitz-Riley Lowpass (6)
Linkwitz-Riley Highpass (7)
When a parameter is invalid for a given filter type, the parametric EQ commands will still set that parameter,
however its value will not be used for filter computations. This valid/invalid parameter information above is
Bandwidth Frequency
Yes Yes
No Yes
No Yes
No Yes
No Yes
No Yes
No Yes
commands.
PEQOE
Units
N/A
N/A
1 = parametric filter
2 = low shelf
3 = high shelf
4 = lowpass
5 = highpass
6 = Linkwitz-Riley lowpass
7 = Linkwitz-Riley highpass
Hz
1/100th octave
dB
dB per octave
0 = filter disabled
1 = filter enabled
Gain Slope
Yes No
Yes Yes
Yes Yes
No No
No No
No Yes
No Yes