Modifying CD player to get at data stream?
(From: Bill Den Beste (billd@reprise.com).) A couple of years ago Elector electronics magazine published several articles about add-on items for digital audio. They also published a construction article for making a CD player. The data stream is called SPDIF (Sony Philips Digital Interchange Format). This is the same data stream format that you’ll see at an internal node on every Sound Blaster card. It is not just audio waveforms encoded as numbers. It also can contain the copy bits, and perhaps other stuff. I believe that it is a 24 bit data format, even though the data on the CD itself is only 16 bits. Philips and SGS Thomson make neat consumer IC’s that process this data stream in various ways. Again see the back issues of Elector for more information. If you cannot find them, let me know by email and I’ll search my archive. Designing CDROM reader to recover data from damaged CDs, CD-Rs, or CD-RWs A disc/k which has been cracked or some of the coating has peeled off, may be totally
