Polycom SoundStructure C16 Design Manual page 647

Description
When this parameter is set to 1, the microphone is considered a chairman
microphone.
am_chan_bias
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: -20.0, Maximum: 20.0, Resolution: 0.1
Default 0.0
User Limits No
Supported
Event Source No
Description
This parameter sets the channel bias (in dB) for the associated microphone. For
the purpose of determining activity status, this microphone is treated as
though its level were higher or lower (according to the setting of the parame-
ter) than its actual measured level.
am_decay_time
Argument Argument value
Channel Type Global System
Value Type Integer
Read/Write Mode Read/Write
Indices 1-63 : group number
Systems Limits Minimum: 10, Maximum: 10000
Default 1000
User Limits No
Supported
Event Source No
Command Protocol Reference Guide
Automixer Channel Bias
Automixer Decay Time
A - 131