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Date: Fri, 16 May 1997 21:44:09 +0300 (EEST)
Message-Id: <199705161844.VAA02474@silver.sms.fi>
From: Petri Helenius <pete@sms.fi>
To: oliver.fromme@heim3.tu-clausthal.de (Oliver Fromme)
Cc: hasty@rah.star-gate.com (Amancio Hasty), multimedia@FreeBSD.ORG
Subject: Re: new cd-da player
In-Reply-To: <199705161827.UAA15669@elch.heim4.tu-clausthal.de>
References: <199705160849.BAA16914@rah.star-gate.com>
	<199705161827.UAA15669@elch.heim4.tu-clausthal.de>
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Oliver Fromme writes:
 > 
 > I guess you are talking about my CD-DA reader called "tosha"
 > (http://www.heim3.tu-clausthal.de/~olli/tosha/).  I am well
 > aware that it doesn't perform jitter correction at all.
 > There are several reasons for that:
 > 
 >  - I don't have access to any CD-ROM drive that requires
 >    jitter correction.
 >  - My own CD-ROM drive doesn't work at all with jitter
 >    correction (for example, using the CDDA under DOS, I have
 >    to turn jitter correction off to get it working correctly).
 >  - It is my understanding that all newer CD-ROM drives do not
 >    require jitter correction.  This is especially true for
 >    SCSI drives (tosha does not support IDE drives).
 > 
 > Because of those reasons, I didn't take the trouble to
 > implement jitter correction.
 > 
I have:
(ahc0:6:0): "TOSHIBA CD-ROM XM-5401TA 3115" type 5 removable SCSI 2
cd0(ahc0:6:0): CD-ROM cd present [327758 x 2048 byte records]

Guess this does not qualify as a 'new' drive since it's only
quad-speed and I guess single-speed for CDDA applications. The problem
is that I get panic's with 'cdd' application and bad (jittery) data
with 'tosha' but no problem actually reading the data.

I'm trying to merge parts from tosha and cdd to make a combined
utility that would both do jitter correction and work with the freebsd
SCSI driver without screwing it up.

Pete