Polycom SoundStructure C16 Design Manual page 406

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
A - 64
low_shelf_en Enable Low Shelving Filter
Argument Argument value
Channel Type Virtual Channel
Value Type Boolean
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Conferencing Line Output,
Sound Reinforcement Mic/Line Input, Sound Reinforcement
Line Output, Analog Telephony Input, Analog Telephony
Output, Submix, ConferenceLink Aux Input, ConferenceLink
Aux Output
Virt Chans Mono, Stereo
Default 0
Description
This parameter enables (1) or disables (0) the low shelving filter for the
specified virtual channel.
low_shelf_frequency Frequency Of Low Shelving Filter
Argument Argument value
Channel Type Virtual Channel
Value Type Floating-Point
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Conferencing Line Output,
Sound Reinforcement Mic/Line Input, Sound Reinforcement
Line Output, Analog Telephony Input, Analog Telephony
Output, Submix, ConferenceLink Aux Input, ConferenceLink
Aux Output
Virt Chans Mono, Stereo
System Limits Minimum: 20.0, Maximum: 20000.0, Resolution: 0.1
Default 500.0
User Limits No
Supported
Description
This parameter sets the cutoff frequency (in Hz) of the low shelving filter. This
is the frequency at which the shelving filter's gain is half its maximum gain.