Polycom SoundStructure C16 Design Manual page 621

Argument Argument value
Conferencing Mic/Line Input, Conferencing Line Output,
Sound Reinforcement Mic/Line Input, Sound Reinforcement
Phys Chans Line Output, Analog Telephony Input, Analog Telephony
Output, Submix, ConferenceLink Aux Input, ConferenceLink
Aux Output
Virt Chans Mono, Stereo
System Limits Minimum: 1.0, Maximum: 100.0, Resolution: 0.1
Default 2.0
User Limits No
Supported
Event Source No
Description
This parameter sets the ratio of the target gain applied by the expander versus
the difference between the input signal level and the expander threshold. For
example, if the expander ratio is 2 (i.e., 2:1) and the input signal level is 3 dB
below the expander threshold, the expander applies -6 dB of gain.
dp_exp_thresh
Argument Argument value
Channel Type Virtual Channel
Value Type Floating-Point
Read/Write Mode Read/Write
Conferencing Mic/Line Input, Conferencing Line Output,
Sound Reinforcement Mic/Line Input, Sound Reinforcement
Phys Chans Line Output, Analog Telephony Input, Analog Telephony
Output, Submix, ConferenceLink Aux Input, ConferenceLink
Aux Output
Virt Chans Mono, Stereo
System Limits Minimum: -100.0, Maximum: 0.0, Resolution: 0.1
Default -100
User Limits No
Supported
Event Source No
Command Protocol Reference Guide
Expander Threshold
A - 105