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Professional decks will use higher tape speeds, with 15 and 30 inches per second being most common, while lower tape speeds are usually used for smaller recorders and cassette players, in order to save space where fidelity is not as critical as in professional recorders. By providing a range of tape speeds, users can trade-off recording time against signal quality with higher tape speeds providing greater frequency response.

There are many different tape speeds which are in use in all sorts of tape recorders. Speed may be expressed in centimeters per second (cm/s) or in inches per second (in/s).