Gravitational pull is the invisible force that causes massive objects to pull other objects towards them. For instance, when a person jumps up in the air, it is the earthâs gravitational pull... Gravitational pull is the invisible force that causes massive objects to pull other objects towards them.
Audacity is a free, easy-to-use audio editor and recorder for Windows, Mac OS X, and GNU/Linux. You can use Audacity to: 1  Record live audio; 2  Cut, Copy and Paste, Delete, Duplicate, and Split audio files; 3  Change the speed, pitch or volume of a recording; 4  Apply effects to any part of the sound; 5  Align audio segments.
more about Audacity here. This short tutorial will show how you can use Audacity to adjust the volume of a sound clip. Often times, it's needed because the audio is too faint, i.e. the amplitude is low and you can hardly hear the words or music even when cranking up the volume on your speakers or headset.After loading the audio into Audacity, you'll see a graphic representation known as a Waveform.If you scroll down to the bottom of this tutorial you'll see what it should look like if the audio is at a good volume level and using most of the available dynamic range.ften times, it's needed because the audio is too faint, i.e. the amplitude is low and you can hardly hear the words or music even when cranking up the volume on your speakers or headset. After loading the audio into Audacity, you'll see a graphic representation known as a Waveform.