Operation Manual

6.32 Knob 98
Note: see also the Vkeyboard and Polykey and Polyvkey modules.
6.32 Knob
The Knob module is used to adjust the amplitude of a signal. It acts in the
same way as the Slider module. It has one input and one output. The output signal
is the input signal multiplied by a constant varying between 0 and 2 (+6dB).
Typical Use
The Knob module is used whenever the level of a signal must be adjusted.
The default values of the following parameter is set at construction
• gain: default value of the volume gain (value between 0 and 2).
6.33 LESS
The LESS module performs the comparison between its two inputs. The one output of this module
is either 1 (true) or 0 (false) depending on the values sent to the two inputs. The output is true (1)
if the first input is lower than the second and false (0) otherwise.
6.34 Level
The Level module is a VU Meter used to show the RMS (root mean square)
value of a signal (1 Volt full scale). This module has one input and no output.
The red sector indicates the saturation zone of the signal which also triggers
the red LED (see saturation curve of the Audio Out module).
Typical Use
A Level module is generally used to monitor the audio signal sent to the com-
puter sound card through the Audio Out module as shown in Figure 5 under
Audio Out.