A discomix, or simply a disco, is an extended reggae 12-inch single that typically features the vocal track followed by a dub version or a deejay version of the same track.^[1][2] The format became popular in the mid-1970s, with the extended bass range of 12-inch singles being better suited to dub music.^[1] The first big hit discomix was "Ya Ho" by the Jays and Ranking Trevor, released in 1976.^[3] The popularity of the format led to Black Echoes magazine (later Echoes) publishing a weekly 'Reggae Disco Chart'.^[4]