Ultra Rare Trax performer The Beatles
Ultra Rare Trax was a series of bootleg recordings of the Beatles, featuring studio outtakes, that first appeared in 1988. It took advantage of a legal loophole known as the "protection gap" that allowed bootleggers to release old recordings due to ambiguous copyright laws. In all, eight volumes were produced. It was not the first Beatles bootleg to appear on compact disc but it was the first one to achieve widespread attention with bootleggers, because its sound quality showed what digital remastering was capable of.