The document describes applying two different audio effects, Voxengo Boogex and ReaFir, to an audio recording taken in a corridor. Applying Voxengo Boogex made the speech sound scratchy and quiet by emphasizing background noise over the speech. Applying ReaFir used a graphical interface to change the pitch of the recording by manipulating points on a line, making the speech sound high or low depending on the placement of points.