CD DVD Duo Disc

Duo Disc or Dual Disc is a type of double-sided optical disc product which has been developed by a group of record companies such as EMI Music, Universal Music Group, Sony/BMG Music Entertainment, Warner Music Group, and 5.1 Entertainment Group and is now under the aegis of the Recording Industry Association of America (RIAA). It includes an audio layer which is similar to a CD (but not following the strict Red Book CD Specifications) on one side and a standard DVD layer on the other. In this respect it is similar to, yet distinct from, the DVD 10 Dual layer Double Sided discs.