Brad Parker sez:
Turns out that very few SCSI CD-ROMs have the capability to run the digital audio through the SCSI connection. Looks like the Toshiba's (and their IBM siblings) are in! Amazing.
From the alt.cdrom.faq
37. How do I read an audio cd track as digital data?
Most CD-ROM drives cannot decode audio information. There are firmware and data path reasons why it doesn't work.
The following drives can do digital audio extraction over the SCSI bus:
The Hitachi 6750S might, if the rumors prove true
Looking at the specs for the XM 4101B, it sez "This drive supports CD-DA transfer over SCSI function that the host system can read CD audio data". (also sez that it can be used as an independant CD audio player seperate from the system).
I think there are more drives that support CD-DA from Toshiba.
For the Toshiba drives, you issue a MODE SELECT command with density code 0x82 and then all read's with an lba inside a digital audio track will return 2352 bytes audio samples / block.
There are several ways to read digital audio from Sony CDU 561 and Sony CDU 8003 mechanisms. Note that the technique of merely setting the density (0x82) using MODE SELECT SCSI command as on Toshiba TXM-3401s will not work.
Here are three ways to read digital audio Red Book standard audio track data across the SCSI bus into your computer complete with all sound processing already performed (For example the
CIRC routine already run and the output is LRLRLR pairs of 16 bit digital audio samples 2352 bytes per CD-ROM block.
Method 1 : READ CD-DA scsi command 0xD8
Method 2 : READ CD-DA MSF scsi command 0xD9
For this one you will want 2352, but I have not tried this technique and Sony recommends the special streaming commands.
WARNING: for high quality use large transfers but QUICKLY
reissue another command as soon as a command is completed. The head
must never ment is entitled "Toshiba CD-ROM, SCSI-2 Interface
Specifications, Ver. 6.0, Issued Jul., 1992". The cost is $7.64 +
$4 shipping. Note that this is extremely technical material, and
won't be useful to the average user.
Software that Supports CD-DA Transfers
From Al Brandt
I use that software that came with my Rio Player. Works fine with an Adaptec card and the Smart and Friendly. My Toshiba (don't know the model #) seemed to work fine as well.