audio (acdt01) dump broken? (BETA4 (5))
olli at lurza.secnetix.de
Mon Sep 19 05:29:31 PDT 2005
Emanuel Strobl <Emanuel.strobl at gmx.net> wrote:
> Ben Kaduk wrote:
> > I also checked the handbook for copying cd's -- you are correct that
> > 2352 is the "magic" blocksize -- I used 64k when ripping an entire
> > (data) cd to copy it.
It's not "magic", it's simply the "Red Book" sector size of
a CD. (The sample rate is 44.1 khz, so you have 176400
bytes per second [44100 * 4]. A single-speed drive reads
75 sectors per second, so you need 176400 / 75 = 2352 bytes
per sector. That's where the number comes from.)
> Hmm, AFAIK WAV _is_ PCM, both don't have any headers. But I'm out of=20
> business for details for more than 10 years, so I may be wrong.
No, WAV is a format invented by Microsoft which contains a
header (usually 44 bytes, but it can vary). "Raw PCM"
doesn't have a header (when handling CD audio data, it's
usually 2-channel signed 16 bits little-endian linear data).
You can use sox for conversion.
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
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