The sixth game introduces Cassette Man, a male voice instructing the player on cassette recordings. Tape and tape speed were identical with the Compact Cassette. Programs were stored on cassette tape cartridges. A failed digital tape recording system was the Digital Compact Cassette (DCC). Arista released a soundtrack album on record, cassette and compact disc. It was issued on vinyl, cassette and 8-track. Walkman originally referred to portable audio cassette players. It is available as a BBC audiobook in CD and audio cassette formats. It was released by GNP Crescendo on CD and cassette tape. Notches on top of the cassette shell indicate the type of tape. The Album came out on LP, CD and cassette. It was available on vinyl, cassette and CD. The production was recorded for sale as an audio book on cassette or CD. They were issued separately on dual cassette and double CD. Programs were entered, then saved and loaded on cassette tape.