Depending on the media used, some releases were double albums in one format and single albums in another. For example, a gramophone record (vinyl LP) consisting of two discs of less than 80 minutes in total could be fit onto a single standard-length compact disc (CD). Other times, track order could vary between two different media, by re-arranging the tracks in one media, a more efficient use of space could be used, for example reducing a double album in LP format to a single cassette tape.