Redbook.sys Showing Up In My Event Viewer...

[SlickVic78]

Hello,

I've noticed that for some reason, in my Event Viewer under the System, I am getting a lot of sources for redbook.sys showing up. When I click on it for details, I get the following:

Quote:

This drive has not been shown to support digital audio playback.

What exactly is redbook, and what could this be pertaining to?

Any help would greatly be appreciated!

Thanks!
-SlickVic78

[mikeh420]

Try this:

http://www.osr.com/ddk/stream/aud-design_1kiv.htm

KS filter that manages the rendering of CD digital audio

[war59312]

The Redbook system driver (redbook.sys) is the KS filter that manages the rendering of CD digital audio. The Redbook driver is a client of the SysAudio system driver. The system routes CD digital audio through the file system to the Redbook driver and then to the SysAudio driver. The CD digital audio is rendered on the preferred wave output device (as set in the Multimedia property pages in Control Panel).

[SlickVic78]

I've read this stuff, but not sure what it means by when it says in the detail section:

Quote:

This drive has not been shown to support digital audio playback.

What drive is this referring to? This is showing up 3 times in a row (every time I start my computer).

-SlickVic78

[Tomboy]

@SlickVic78

The standard that defines the format of an audio CDs is referred to as the "redbook" standard (I think because the original standard was published with a red cover). Therefore, the Redbook.sys driver is named after the CD standard. There are other CD standards that cover Data CDs, VCDs, SVCDs, ...etc also referred to by the color of the standard's cover. I know that VCDs are covered by the "Whitebook" standard and I think Data CDs are covered by the "Yellowbook" standard. Most of these standards were originally written by Phillips Corp. That is why Phillips was recently upset about copy protected audio CDs carrying the "digital audio CD seal" (you know the symbol on the CD) when the discs do not and cannot follow the "Redbook" standard. I hope this helps explain the name.

Regarding the message:

"This drive has not been shown to support digital audio playback."

Not all CDROM drives are capable of digital audio playback (usually requires a different type of sound cable between the drive and your sound card to carry digital rather than analog data). Digital playback is more precise but is more difficult to accomplish. Analog sound output is the norm for CDROM drives.

Tomboy

[SlickVic78]

Hey Tomboy,

Thanks for filling me in on Redbook. Very informative! I guess I should just overlook this system notice within my Event Viewer...

-SlickVic78