Polycom SoundStructure C16 Design Manual page 431

fb_filter_bandwidth Feedback Reduction filter Bandwidth
Argument Argument value
Channel Type Virtual Channel
Value Type Floating-Point
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Sound Reinforcement Mic/Line
Input
Virt Chans Mono, Stereo
System Limits Minimum: 0.03, Maximum: 1.0, Resolution: 0.01
Default 0.1
User Limits No
Supported
Description
This parameter sets the bandwidth (in octaves) for all the filters of the feedback
reduction algorithm.
fb_filter_decay_en Enable Filter Decay Mode In Feedback Reduction Algorithm
Argument Argument value
Channel Type Virtual Channel
Value Type Boolean
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Sound Reinforcement Mic/Line
Input
Virt Chans Mono, Stereo
Default 0
Description
This parameter enables (1) or disables (0) filter decay mode for the feedback
reduction algorithm. If filter decay mode is enabled, the adaptive notch filters
can slowly decay to 0 dB if no singing is detected at that frequency. This mode
is useful in rooms with high noise or where there is a lot of motion.
Command Protocol Reference Guide
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