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Why does "ddrescue" fail for Audio Discs? (lemmy.ml)

submitted 2 days ago* (last edited 2 days ago) by doomsdayrs@lemmy.ml to c/asklemmy@lemmy.ml

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I have an audio disc that I want to produce a one to one ISO of (it has some marks).

When I try to use "ddrescue" to copy it, I get the following error message. ddrescue: /dev/sr0: Unaligned read error. Is sector size correct?.

What am I doing wrong? I would assume "ddrescue" would automatically figure out the sector size.

To note, I want to use "ddrescue" because "abcde" keeps hitting read errors on the disk.

Edit:

Seems that "ddrescue" does not support audio discs (https://unix.stackexchange.com/a/558628).

And "abcde" already uses "cdda paranoia".

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[–] angband@lemmy.world 4 points 1 day ago

audio cds are not a block format, they are a stream. dd works on block devices, where it can request blocks sequentially from the drive. audio cds can only be positioned by track, and even have to be oversampled to correct for jitter: https://www.cdroller.com/htm/readaudio.html