The document discusses various sound effects that were recorded and then edited by changing the pitch and adding audio effects. Several sound effects from recording a car, chair, coughs, door opening, cafeteria ambience, outdoor voices, and scraping a shoe on concrete are described. Effects like ambience, ReaVerb, and changing the pitch were used to modify the sounds and create atmospheric, low-pitched, and sometimes sinister or eerie effects that could be implemented in a game.