The document discusses several audio tracks that have been modified in various ways. The first track had its panning changed in different places to switch the sound between left and right speakers. Two other tracks were faded in and out to connect sections of audio. Another track changes in pitch and volume to make a sound appear to vanish in one ear. A repeating sound switches between ears by varying the pitch each time. The final track fades out in volume to transition to the next piece of audio.