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There's a practical problem here. Audio CD players generally provide no easy way to get the raw bits into a computer (SPDIF interface cards exist for PCs, but they're rare and expensive). And I haven't yet figured out how to get a CD-ROM drive to read the raw bits off an audio CD; I suspect it requires munging the firmware in the drive, which makes anything you do highly manufacturer specific.
Apple's CD-300/300i drives can read audio bits directly and turn them into a QuickTime sound channel, as can SGI's SCSI CD. Apple uses a Sony mechanism, and SGI uses a Toshiba. The SGI drives use modified firmware and (AFAIK) are not available elsewhere, but you can get the Apple drives at Circuit City, Sears, etc. With the right sequence of SCSI commands you could easily capture an "audio" bitstream, then munge it as desired to extract the stegged data, play it backwards, or whatever. IIR, code to directly read arbitrary audio data on an Apple CD-ROM was recently posted in comp.sys.mac.programmer, but I didn't save it. - -Paul - -- Paul Robichaux, KD4JZG | "Though we live in trying times perobich@ingr.com | We're the ones who have to try." - Neil Peart Intergraph Federal Systems | Be a cryptography user- ask me how. Of course I don't speak for Intergraph. -----BEGIN PGP SIGNATURE----- Version: 2.3a iQCVAgUBLVen7SA78To+806NAQG3sAQAu8prXRUkJKWwmQBIeJxwQIDK+2ilvyxe 24rcK89EInIyEdLnsSrx4uly3CBpS7iWdOmoAQ9tNu5tOOi3xc+5W5cvUTJ4t/NR gblnKM/qevO6PCdQFiJXNgzg/1DkY2LsrvnH3I+8lxXeNn06CQKB85r5COY2vL3I ldqrGjLScHU= =GjEo -----END PGP SIGNATURE-----