ABSTRACT
Most of the operator’s work is performed in the control room, seated in front of and operating the audio control board or control console and its associated equipment, but occasionally she operates remotely, in the “field,” with portable control equipment. Digital audio takes a completely different approach to the handling and storage of audio signal. In analog audio the signal information may be varied in an almost infinite manner, within the boundaries of the 20 Hz to 20 KHz frequency band, and that variation may be described for our purposes in terms of voltage variation in audio circuitry or by magnetic flux strength variation in a magnetic tape recording. When analog audio is transmitted or stored, either its amplitude or its frequency is the determining factor in its modulation, or wave envelope. The two basic components of digital audio are sampling and quantization. The quantization process provides a specific number of discrete elements to represent the digitized signal amplitude.
