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.
Audacity is an open source, cross-platform audio editor and recorder. Audacity can record and play sounds and import and export WAV, AIFF, MP3, and OGG files. Edit your sounds using cut, copy, and paste features (with unlimited undo functionality), mix tracks, or apply effects to your recordings. Audacity also has a built-in amplitude-envelope editor, a customizable spectrogram mode, and a frequency-analysis window for audio-analysis applications.