The chirp was created by DJ Cash Money around 1985 and first recorded by DJ Jazzy Jeff on "The Magnificent Jazzy Jeff," released on the 1987 album "Rock the House" by DJ Jazzy Jeff and the Fresh Prince.
A chirp scratch is performed by moving the record backwards with the fader open, closing the fader, then moving the record forward with the fader open.
Source: DJ Axel Foley
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