DVD discs are the same diameter (120mm) and thickness (1.2mm) as a Compact Disc but a DVD can store 13 times or more data.

There are 6 versions of Franz Schubert’s “Die Forelle” (“The Trout”), simply because when friends asked him for copies of the song, he wrote out new copies to the best he could remember at the time.

The harmonica is the world’s best-selling music instrument.

The LP (long-playing) record was invented by Paul Goldmark in 1948. The LP is not dead yet: more than 10 million LPs are sold every year.

Duran Duran took their name from a mad scientists in the movie Barbarella.