Polycom Vortex EF2210 Program Manual page 80

Description Value Range
Channel 1, A, B
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-
Slope
Riley 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 provided mainly as guidelines for programmers writing control software for the
Vortex. If a parameter is not valid for a specific filter type, then the control for editing that parameter
should be disabled or removed when that filter type is selected.
This command is saved to non-volatile memory only as part of a preset. The state of this command
will be restored after power-up only if a preset is saved and that preset is set to be the power-on
Bandwidth
Yes
No
No
No
No
No
No
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
Frequency Gain
Yes Yes
Yes Yes
Yes Yes
Yes No
Yes No
Yes No
Yes No
Slope
No
Yes
Yes
No
No
Yes
Yes