[rspencer]

DVDs are essentially saved as DATA. If .wav files are saved as data, it'd be OK. But usually they are burned as audio discs (obviously, in order to listen). Audio CDs require extraction using software such as EAC (the recommended method).

The burning & extraction processes can, and usually do, introduce digital errors. These errors may not be audible at first, but over time they will be.

And while a CDR source of a circulated tape may be allowed, we do not allow CDR copies of released silver CDs. The Silver CD is considered the "pure" source (not going to get into this argument). There are clearly a number of CDs printed, so TTD requires that any seed sourced from a silver CD be sourced directly from said silver CD.