dd an audio cd on 5.x ?
Hi, I need to make an image (I do need a copy so saving and writting individual tracks is of no use) of an audio CD, but when I try: # dd if=/dev/acd0c of=bizprez.iso bs=2048 I get : dd: /dev/acd0c: Invalid argument because devfs is nicely making the acd0t0nn files in /dev and no acd0c. How can this be overcome ? Thanks, IOnut ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
Ion-Mihai Tetcu [EMAIL PROTECTED] writes: I need to make an image (I do need a copy so saving and writting individual tracks is of no use) of an audio CD, but when I try: # dd if=/dev/acd0c of=bizprez.iso bs=2048 That command will copy a data disk, but you have separate tracks on this thing. I get : dd: /dev/acd0c: Invalid argument because devfs is nicely making the acd0t0nn files in /dev and no acd0c. Which is appropriate, because there isn't *any* filesystem on your disk. How can this be overcome ? The closest I think you can get is the suggestion in the cdrecord manual, which uses cdda2wav and cdrecord to get as much of the lead-in, lead-out, and CD-text information correct as possible. ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
On Tuesday 08 July 2003 22:55, Lowell Gilbert wrote: Ion-Mihai Tetcu [EMAIL PROTECTED] writes: I need to make an image (I do need a copy so saving and writting individual tracks is of no use) of an audio CD, but when I try: # dd if=/dev/acd0c of=bizprez.iso bs=2048 That command will copy a data disk, but you have separate tracks on this thing. Ok. And if I want to copy bit by bit ? I get : dd: /dev/acd0c: Invalid argument because devfs is nicely making the acd0t0nn files in /dev and no acd0c. Which is appropriate, because there isn't *any* filesystem on your disk. I know. How can this be overcome ? The closest I think you can get is the suggestion in the cdrecord manual, which uses cdda2wav and cdrecord to get as much of the lead-in, lead-out, and CD-text information correct as possible. I'll try, thanks IOnut ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
Ion-Mihai Tetcu wrote: On Tuesday 08 July 2003 22:55, Lowell Gilbert wrote: [ ... ] That command will copy a data disk, but you have separate tracks on this thing. Ok. And if I want to copy bit by bit ? You'd have to obtain the glass master used to press the original to get an absolutely exact copy. bit-by-bit accuracy of the raw CD is not very easy or even desirable to obtain due to ECC hardware fixing minor errors: for audio, you want a bit-by-bit accurate copy of the data after ECC processing, not before. Better CD-burners let you do something known as DAO+96 ot TAO+96, which lets you override the ECC hardware when reading or writing, and thus copy even the errors from the original, which can be useful for copy-protected data CD's rather than for audio -- -Chuck ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
On Tuesday 08 July 2003 23:43, Chuck Swiger wrote: Ion-Mihai Tetcu wrote: On Tuesday 08 July 2003 22:55, Lowell Gilbert wrote: [ ... ] That command will copy a data disk, but you have separate tracks on this thing. Ok. And if I want to copy bit by bit ? You'd have to obtain the glass master used to press the original to get an absolutely exact copy. bit-by-bit accuracy of the raw CD is not very easy or even desirable to obtain due to ECC hardware fixing minor errors: for audio, you want a bit-by-bit accurate copy of the data after ECC processing, not before. OK, do you know any method to do it under BSD ? There are some cdtools in the ports that claim to do DAE - but I haven't the time to look in thecode to see how it is done and if there is any difference between using a SCSI an an IDE drive. Better CD-burners let you do something known as DAO+96 ot TAO+96, which lets you override the ECC hardware when reading or writing, and thus copy even the errors from the original, which can be useful for copy-protected data CD's rather than for audio We have a potential client who asked about studying both cases and make him a app that could say if it's an original or not so this sounds interesting (we're pretty new on this). Thanks, IOnut ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
On Tue, 8 Jul 2003, Ion-Mihai Tetcu wrote: On Tuesday 08 July 2003 22:55, Lowell Gilbert wrote: Ion-Mihai Tetcu [EMAIL PROTECTED] writes: I need to make an image (I do need a copy so saving and writting individual tracks is of no use) of an audio CD, but when I try: # dd if=/dev/acd0c of=bizprez.iso bs=2048 That command will copy a data disk, but you have separate tracks on this thing. Ok. And if I want to copy bit by bit ? 12.5.5 Duplicating Audio CDs gives instructions on using dd to duplicate an audio CD. Cheers, Viktor ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
On Tue, 8 Jul 2003, Viktor Lazlo wrote: On Tue, 8 Jul 2003, Ion-Mihai Tetcu wrote: On Tuesday 08 July 2003 22:55, Lowell Gilbert wrote: Ion-Mihai Tetcu [EMAIL PROTECTED] writes: I need to make an image (I do need a copy so saving and writting individual tracks is of no use) of an audio CD, but when I try: # dd if=/dev/acd0c of=bizprez.iso bs=2048 That command will copy a data disk, but you have separate tracks on this thing. Ok. And if I want to copy bit by bit ? 12.5.5 Duplicating Audio CDs gives instructions on using dd to duplicate an audio CD. Heh oops, that was meant to be: Section 12.5.5 Duplicating Audio CDs of the Handbook gives instructions on using dd to duplicate an audio CD. Cheers, Viktor ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
On Wednesday 09 July 2003 01:05, Viktor Lazlo wrote: On Tue, 8 Jul 2003, Ion-Mihai Tetcu wrote: On Tuesday 08 July 2003 22:55, Lowell Gilbert wrote: Ion-Mihai Tetcu [EMAIL PROTECTED] writes: I need to make an image (I do need a copy so saving and writting individual tracks is of no use) of an audio CD, but when I try: # dd if=/dev/acd0c of=bizprez.iso bs=2048 That command will copy a data disk, but you have separate tracks on this thing. Ok. And if I want to copy bit by bit ? 12.5.5 Duplicating Audio CDs gives instructions on using dd to duplicate an audio CD. Which is from where i've started this thred ;) kinnda. I don't want gest to copy the tracks, but also the rest. And know if I get the same CDDB discid. Thanks, IOnut ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
Ion-Mihai Tetcu wrote: [ ... ] You'd have to obtain the glass master used to press the original to get an absolutely exact copy. bit-by-bit accuracy of the raw CD is not very easy or even desirable to obtain due to ECC hardware fixing minor errors: for audio, you want a bit-by-bit accurate copy of the data after ECC processing, not before. OK, do you know any method to do it under BSD ? There are some cdtools in the ports that claim to do DAE - but I haven't the time to look in the code to see how it is done and if there is any difference between using a SCSI an an IDE drive. Modern CD-ROM burners use the SCSI command set and thus behave much like a SCSI device modulo various per-device quirks: the ATAPICAM module connects IDE CD-ROM's (ATAPI CD-ROM's) via the SCSI CAM system. Better CD-burners let you do something known as DAO+96 ot TAO+96, which lets you override the ECC hardware when reading or writing, and thus copy even the errors from the original, which can be useful for copy-protected data CD's rather than for audio We have a potential client who asked about studying both cases and make him a app that could say if it's an original or not so this sounds interesting (we're pretty new on this). 2048 bytes of actual data get turned into ~2536 bytes of Reed-Solomon ECC encoded data. There is also a 94 byte subchannel + 2 byte checksum (for 96) which is used to contain CD+G data and other information, which is probably a part of what you'll need to consider to have the CDDB diskid match. For example, man burncd has the following: vcd Set the write mode to produce VCD/SVCD tracks for the fol- lowing image files on the command line. This automatically sets DAO (-d) and ``no gaps'' (-n) modes. A good copy of a professionally mastered audio disk obviously will not have 2-second gaps between tracks (burned DAO and not TAO), will be closed (fixate), etc. I'm not an expert, however-- perhaps talk to sos at freebsd.org who wrote a goodly portion of this infrastructure for FreeBSD... -- -Chuck ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: dd an audio cd on 5.x ?
On Wednesday 09 July 2003 01:43, Chuck Swiger wrote: Ion-Mihai Tetcu wrote: [ ... ] You'd have to obtain the glass master used to press the original thanks for all IOnut ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
