ABSTRACT
The majority of audio processes are constructed to modify and synthesize audio data in terms of time domain signals (amplitude varying over time). This form of audio data is analogous to the variations in air pressure that are received by the human auditory system. The human auditory system, however, is sensitive to the nature of the frequency domain partials that compose the time domain signal (as described in Chapters 3 and 4). In some cases it can be useful to directly manipulate the frequency domain form of sounds, when a time domain approach would be awkward, or produce side effects.
