What is "scratchcratchratchatch"

Scratchcratchratchatch is the debut mixtape of turntablist Kid Koala. There were reports of only 500 copies released initially., but it was picked up by Ninja Tune records. They continue to sell it in its original format as a cassette tape. Due to heavy use of unlicensed samples, the cassette has a label with 'for promotional use only' printed on it.