Polycom SoundStructure C16 Design Manual page 436

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
A - 94
nc_level Noise Cancellation Level
Argument Argument value
Channel Type Virtual Channel
Value Type Floating-Point
Read/Write Mode Read/Write
Phys Chans Conferencing Mic/Line Input, Analog Telephony Input
Virt Chans Mono, Stereo
System Limits Minimum: 0.0, Maximum: 20.0, Resolution: 1.0
Default 10.0
User Limits No
Supported
Description
This parameter sets the amount of cancellation (in dB) applied by the noise
cancellation algorithm.
sig_gen_gain Signal Generator Gain
Argument Argument value
Channel Type Virtual Channel
Value Type Floating-Point
Read/Write Mode Read/Write
Phys Chans Signal Generator
Virt Chans Mono
System Limits Minimum: -100.0, Maximum: 20.0, Resolution: 0.1
Default -30.0
User Limits No
Supported
Description
This parameter sets the gain of the signal produced by the signal generator, in
dB. A gain of 0 dB will produce a signal that has the same RMS level as a sine
wave at -20 dBFS (the nominal signal level). This means that not all signal
types will have the same peak level, and some types may clip before a gain of
20 dB is applied.