Use this feature to alter the amplitude (volume level) of an audio file. An amplification coefficient in percent. If Amplify = 100, then audio array isn't changed. If Amplify > 100 then Volume of audio is increased, otherwise it is decreased.
How to use
-Left-click-and-drag on the select a portion of the audio
-Click Effects menu and select Amplify
Tip: how to select a portion of the audio