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PC Audio Editing with Adobe Audition 2.0 by Roger Derry

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Appendix 3

Time code

All modern audio systems have a time code option. With digital systems, it is effectively built in. At its simplest level, it is easy to understand; it stores time in hours, minutes and seconds. As so often, there are several standards.

The most common audio time display that people meet is on the CD; this gives minutes and seconds. For professional players, this can be resolved down to fraction of second by counting the data blocks. These are conventionally called frames and there are 75 every second. This is potentially confusing as CDs were originally mastered from 3/4 inch U-Matic videotapes (VT) where the data were configured to look like an American television picture running at 30 video frames per second (fps).

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