The Signal Amplifier module can be used to increase or reduce the level of an audio signal and can also be used to invert signals.
From the File>Add modules>Sound Processing menu, or from the pop-up menu on the data model display select "Signal Amplifier". Enter a name for the new amplifier module and press Ok.
To access the module's settings, select Detection>Signal Amplifier... from the detection menu. This will bring up a dialogue similar to the one shown below.
Select the sound source from the drop down list
Set the gain for each channel in dB
Check the box if you wish to invert the signal on a channel (multiply all valued by -1).
Other PAMGUARD modules that use raw audio data can then subscribe to the output of the Signal Amplifier module instead of the sound acquisition module.