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Bit Rate

From Chace Audio

Unlike bit depth, which affects the clarity of an audio signal, bit rate refers to how fast that signal is delivered to us. Specifically, the bit rate is the number of bits that are conveyed or processed per unit of time. This term is used primarily when discussing compressed audio versus an uncompressed digital audio signal (PCM).

For example, an AC-3 file (a form of audio compression used for DVD) can have a bit rate of 192 kbps (compressed), whereas that same program coming out digitally from its Pro Tools® source would most likely be at the equivalent of 2.3 Mbps (an uncompressed, greater bit rate).

Generally, choosing a bit rate requires a trade-off between minimizing the size of a file while maximizing the quality of the material when it is played back.

Tags:
DATA, DIGITAL