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Article #1116Re: Audio quality of CDR, any theory ????
From: Arny Kr�ger
Date: Thu, 17 Dec 1998 00:00
Date: Thu, 17 Dec 1998 00:00
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3212 bytes
Chris Cotellini wrote in message <3678CAFC.985389AC@interstroom.nl>... > > >"Arny Kr�ger" wrote: > >> Chris Cotellini wrote in message <36764B19.A08DFB6F@interstroom.nl>... >> >Well, if you copy from a bad cd, the copy will sound bad too.... I heard >> >a difference between copy and original -> an occasional "pop" in the >> >sound, probably a burn error. Thus the quality (this DOES effect the >> >sound, doesn't it?) is lower than the original without the pop. >> > >> >> The pops are almost always due to data loss. This usually happens when the CD >> is read. > >Then why isn't the "pop" sound there when you play it on the pc cd-writer? Because you are not recording it at that time, and you are playing it at 1x. The worst case of clicks and pops I've encountered happen when making a high speed (2x or 4x) copy. Most CD players are unexpectedly limited in their ability to play an audio CD at speeds higher than 1x. I know of many CD players that run at a real-world 15-20x for reading data, but are reliable only at speeds of 6x and below for reading audio tracks. It is not unusual for a 8 or 16x CDROM reader to be limited to 1x or 2x for audio. >Does a cd-writer use error correction? I don't know... Audio CD's are read with error detection, and on-the-fly error correction. >If the copy is an EXACT copy, these pops wouldn't be there. That is my experience. >I also heard that the >older (slow single/double speed) drives are better in reading audio tracks, is >that true? Very false. The current consensus seems to be that the best CDROM's for reading audio are the Plexstor 32x SCSI and the Panasonic/Creative Labs 24-36x IDE drives. The Plexstor is very reliable in general and can be absolutely counted on to read most audio discs at speeds up to about 10x. The CL/Panasonic is pretty reliable up to about 7x. I have audio discs that my Plex will only read reliably at 1x.
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X-Google-Language: ENGLISH,ASCII X-Google-Thread: 109f11,48d41a4dac9741b4 X-Google-Attributes: gid109f11,public X-Google-Thread: 10ff83,48d41a4dac9741b4 X-Google-Attributes: gid10ff83,public X-Google-Thread: 105a81,48d41a4dac9741b4 X-Google-Attributes: gid105a81,public X-Google-Thread: f6728,48d41a4dac9741b4 X-Google-Attributes: gidf6728,public X-Google-Thread: fb1f8,48d41a4dac9741b4 X-Google-Attributes: gidfb1f8,public X-Google-Thread: 10d85e,48d41a4dac9741b4 X-Google-Attributes: gid10d85e,public From: "Arny Kr�ger" <arnyk@flash.net> Subject: Re: Audio quality of CDR, any theory ???? Date: 1998/12/17 Message-ID: <Mb5e2.1075$IO1.941@news.flash.net> X-Deja-AN: 423206965 References: <753ar1$p8u$1@justice.csc.cuhk.edu.hk> <36764B19.A08DFB6F@interstroom.nl> <Ontd2.2760$Bc5.4143@news.flash.net> <3678CAFC.985389AC@interstroom.nl> X-MimeOLE: Produced By Microsoft MimeOLE V4.71.1712.3 X-Complaints-To: abuse@flash.net X-Trace: news.flash.net 913891180 208.194.218.253 (Thu, 17 Dec 1998 04:39:40 CDT) Organization: FlashNet Communications, http://www.flash.net NNTP-Posting-Date: Thu, 17 Dec 1998 04:39:40 CDT Newsgroups: rec.audio.tech,rec.audio.opinion,rec.audio.misc,hk.rec.audio-visual,uk.rec.audio,tw.bbs.rec.audiophile