QUOTE(UrbanVoyeur @ Jan 19 2007, 14:02)

"Also, many ordinary CD audio players, e.g. in car radios, have problems playing copy-protected media, mostly because they use hardware and firmware components also used in CD-ROM drives."
There are examples user modified firmware that will not choke on these intentional DRM generated errors. And no doubt there are drives out there that ship with DRM free firmware.
You are confusing DRM and copy protection here.
http://en.wikipedia.org/wiki/Digital_Rights_ManagementQUOTE
Pressure from the RIAA has ensured that all a whole lot of current CD/DVD drives have the DRM firmware.
I'm not sure what you mean by that. I don't think the RIAA or IFPI force the drive manufacturers to have their drives fail when trying to read a copy protected CD. In fact, many drive manufacturers seem to make sure that their drives can read CDs with as many different copy protections as possible.
The drive firmware does not have any kind of DRM mechanism in it. What they mean with
"Also, many ordinary CD audio players, e.g. in car radios, have problems playing copy-protected media, mostly because they use hardware and firmware components also used in CD-ROM drives." is that dedicated audio CD players, like a normal CD player without MP3 capability, will disregard all copy protections and treat it like a pure audio CD, thus being unaffected by copy protections.
A CD/DVD drive however can fall for the different copy protection mechanism, as it has no way to treat an audio CD just as an audio CD. Instead, it will first load the disc to see what kind of disc it is, and then it either falls for the CP tricks, or if the drive manufacturers made a more intelligent firmware, it will not fall for the CP tricks and access it like normal.