When credited as DUOPHONIC.DE or www.duophonic.de in the CD matrix or vinyl runout please credit Duophonic.de instead of this page.
Vinyl pressings are credited as "duo20YYXXXX" in the vinyl run-out area. First 4 numbers indicate the year of pressing, starting at 2004.
Most productions were also cut at duophonic by the owner Moritz Illner. In this case the initials "MI" appear in matrix on both sides, which can be easily mistaken as "MD".