From owner-freebsd-multimedia  Thu Dec 20  3:16:15 2001
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To: sos@freebsd.dk
Cc: Erik Moe <emoe@mmcable.com>, freebsd-multimedia@FreeBSD.ORG
Subject: Re: Making audio CDs with FreeBSD
References: <200112180707.fBI77gq74392@freebsd.dk>
From: zach@uffdaonline.net (Zach N. Heilig)
Date: 20 Dec 2001 05:17:31 -0600
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S=F8ren Schmidt <sos@freebsd.dk> writes:

> control -f acd0 info
>=20
> that tells (amongst other things) you how many tracks you need to rip, th=
en
>=20
> for f in  1 2 3 ... (number for tracks)
> do
> 	dd if=3D/dev/acd0t$f of=3Dtrack$f.raw bs=3D2352
> done

But, what can be done when this happens?

$ dd if=3D/dev/acd0t5 of=3Dtrack_05[abcde].raw bs=3D2352
$ md5 track_05?.raw
MD5 (track_05a.raw) =3D 09949dbd56fa5c7ac1fc21b32e3166e9
MD5 (track_05b.raw) =3D 09949dbd56fa5c7ac1fc21b32e3166e9
MD5 (track_05c.raw) =3D 311a2fd451f3788c077962a82e3aaa8a
MD5 (track_05d.raw) =3D 09949dbd56fa5c7ac1fc21b32e3166e9
MD5 (track_05e.raw) =3D c48087a0d63bd92bfff7885b9b292ca0

just assume that the drive properly de-jittered the stream, but
started reading at a slightly different spot and happily ignore the
difference (I don't think I hear any jitters)?

buy a new drive?

And, one bug:

$ dd if=3D/dev/acd0t5 of=3Dtrack_05a.raw bs=3D2352
[ in a separate shell, before the above completes ]
$ cdcontrol -f acd0 info

causes a panic/reboot (I was in X, so I don't know the message).

--=20
Zach Heilig <zach@uffdaonline.net>

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