Polycom SoundStructure C16 Design Manual page 235

Action maps may also be inverted to allow for the case where it is desired for the destination parameter map
to be the inverse of the source parameter. An example of mapping Boolean parameters is shown in the
following figure with both a direct mapping (true  true) and an inverted mapping (true  false)
Mapping Boolean Parameters
Boolean MAP
True
Input
parameter
False
An example of mapping a Boolean parameter would be tying the mute state of a microphone to the logic
output state that drives an LED. Changes in the mute state of a microphone would be mapped directly to a
logic output pin.
Numeric parameters can also be used in action maps. An example of mapping a numeric parameter is
mapping the analog voltage from the logic inputs to the fader of a particular channel. In the example shown
in the following figure (left), the values from the volume knob are mapped to a fader. The analog voltage
values from the volume knob range from 0 to 255 and are directly mapped to the fader range of -100 to
+20dB. Changes in the analog input voltage map directly to the fader values in a linear fashion
Numeric Mapping Parameters
255
0
In addition, if the user min and max values of the fader channel are used, the action map automatically uses
the user min and max range instead of the full -100 to +20 dB range. Using a min/max range on the output
parameter is shown on the right side of the figure where the user min has been set to -20 and the user max
has been set to +10.
Polycom, Inc.
True
Output
parameter
False
+20
-100
Boolean MAP Invert
True
Input
parameter
False
255
0
.
True
Output
parameter
False
.
+20
+10
-20
-100
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