ccccd stands for Channel Code Copy of Compact Discs designed to archive CDs' complete content on the channel code layer.

This project has the goal to archive the complete content of CDs on the channel code layer. Here, the NRZI signal, which stems from a CD player's laser pickup, is recorded directly, providing sort of a pit-land photo of the CD. The resulting image file, in turn, is demodulated and decoded in software within a virtual CD player. The digital audio channel code on LaserDiscs and CD Video discs can be handled as well.

Note: The image extraction functionality requires a proprietary hardware interface in combination with a modified disc player.

Associated open hardware project ccccd-HW can be found here.