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Date:      Tue, 20 May 1997 11:21:33 +0300 (EEST)
From:      Petri Helenius <pete@sms.fi>
To:        oliver.fromme@heim3.tu-clausthal.de (Oliver Fromme)
Cc:        multimedia@FreeBSD.ORG
Subject:   CD audio: jitter correction?
Message-ID:  <199705200821.LAA06110@silver.sms.fi>
In-Reply-To: <199705200323.FAA04178@elch.heim4.tu-clausthal.de>
References:  <199705200323.FAA04178@elch.heim4.tu-clausthal.de>

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Oliver Fromme writes:
 > 
 > Hello,
 > 
 > I hope this is the right place to post questions like this.
 > 
 > As you might know, I have written a program for FreeBSD that
 > reads digital audio via the SCSI bus.  So far I haven't
 > bothered to implement any jitter correction, because it works
 > perfectly well without j.c. with all three drives which I'm
 > able to test it with (a NEC and a Toshiba CD-ROM drive, and a
 > Philips/IMS CD writer).
 > 
 > Now my question is:  How important is jitter correction?
 > Do only older drives need it?  Or am I just lucky that my
 > drives work without?
 > 
You are lucky. However the CDD-utility has since been fixed to work
properly with toshiba drives also with freebsd-2.2.X and includes
jittercontrol so I don't see a need for that any longer.

Pete



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