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Chapter 5. SOUND MEMBERS > FREQUENCY AND BIT DEPTH

FREQUENCY AND BIT DEPTH

Two measurements are used to set the quality of a sound file: sample frequency and bit depth. Sample frequency is the measurement of how often the samples of the sound are taken and stored as digital data. Bit depth is the range of information stored in each sample.

The rate at which audio is sampled is similar to the resolution of a scanned image, and defines how many samples are to be taken in a given time or space. The sample rate defines the detail of the sound wave. More samples can accommodate more detail, which means higher-pitched sounds can be recorded. Natural sounds contain a wide range of frequencies from low to high. The capability to record high-pitched sounds adds to the clarity of the overall sound. Examples of common sample rates include 44.1KHz, 22.05KHz, and 11.025KHz.


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