What is it?
With the Amplify Envelope you can control the amplitude of a sound over time, and with the LFO you can add tremolo with control of the depth over time.

How to use it
The Amplify Envelope has the following two parameters, Range and LFO.  The default parameters will not change the amplitude (after Reset).

The Range popup menu can have a value of x4 to ÷12, it controls the maximum amplitude the envelope can have when it is processed.

The LFO dialog box lets you add tremolo to the sound.  When a waveform is selected, the envelope controls the depth of the LFO.

Notes
See "Envelope", "LFO", and "Reset" for more information.