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Lo-fi (Low Fidelity) is a term used to describe music in which the sound is of a lower quality than the usual standard. The qualities of lo-fi are usually achieved by either degrading the quality of the recorded audio, or using certain equipment. Recent uses of the phrase has led to it becoming a genre; although it still remains as an aesthetic in music recording practice. Many lo-fi artists use inexpensive cassette tape recorders. The term was adopted by WFMU DJ William Berger who dedicated a half hour segment of his program to home recorded music throughout the late '80s under the name Lo-fi.

Source : http://en.wikipedia.org/wiki/Lo-fi_music

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