Polycom C16 - Manual (Page 366)

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
A - 24
Some parameters support user-definable minimum and maximum values. For
these commands, the <limit> argument can be specified. The <limit>
argument is a system-defined text argument and can be one of the following
values:
The behavior of a command when it reaches its minimum or maximum is
determined by the parameter type as described previously. This is typically
used with the fader parameter.
<chan>
Commands that operate on virtual channels may require one or more channel
arguments to define the channel on which to operate. Specifically, system
commands require zero or one channel arguments, virtual channel commands
require one channel argument, and matrix commands require two channel
arguments. For example, the fader virtual channel command requires that a
virtual channel or virtual channel group be specified.
<index>
Parameters may be multi-dimensional while most parameters are scalar. For
example, the gain parameter is scalar, meaning that there is one value for each
physical or virtual channel. An example of a one-dimensional parameter is the
parametric EQ gain parameter. There are multiple bands of parametric EQ for
each physical or virtual channel. The <index> arguments are integer
arguments used to address parameters with a dimensionality of one or higher.
The dimensionality of a command is given in the specific requirements for that
command.
<arg>
The meaning of the argument is specific to each parameter. The syntax of an
argument is determined by its type. Some uses of commands do not require an
argument (for example, get, to get the value of a parameter does not need an
argument).
Parameter Modes
Each parameter command enforces one of the following modes for its
parameter.
Limit Description
min operate on the minimum limit for the parameter
max operate on the maximum limit for the parameter
Parameter Mode Description
read-write the parameter may be both queried and set
read-only the parameter may be queried, but not set
write-only the parameter may be set, but not queried