The document applies to MiniDisc (MD). It defines the mechanical and electrical characteristics necessary to ensure the interchangeability for both pre-mastered optical discs and recordable magneto-optical discs of 64 mm in diameter for the compressed digital audio recording system.
DIN EN 61909:2001 history
2001DIN EN 61909:2001-04 Audio recording - Minidisc system (IEC 61909:2000); German version EN 61909:2000
2001DIN EN 61909:2001 Audio recording - Minidisc system (IEC 61909:2000); German version EN 61909:2000