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Old June 24th 07, 01:18 PM posted to rec.audio.tech,uk.rec.audio,rec.audio.pro,sci.physics
Ty Ford
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Posts: 8
Default How can I tell music has been an MP3? Quantitative Measurement of Fidelity

On Sat, 23 Jun 2007 08:42:57 -0400, Serge Auckland wrote
(in article ):

Not so well when they play MP3 versus CD cuts. Locally, the oldies station
WZBA has enough crunch on their MP3s that I can't really crank a CCR tune
as
loud as I want in the car because the distortion stops me. That's just a
buzz
kill. (could be another problem in their audio chain, but I don't think
so.)

Regards,

Ty Forf

--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=4RZJ9MptZmU

Maybe we should be grateful that here in the UK, the BBC and our larger
commercial stations won't allow the use of MP2/3 or MiniDisc source material
except in unusual circumstances. As far as I know, GCap (GWR and Capital
Groups) and the BBC's hard-disc playout systems are all linear, as are the
studio-transmitter links. Whilst they do have very heavy audio compression in


the transmission processor, the FM signal stays linear from CD through to FM
transmitter. The reason for this is that the same signal is used for the DSat


and DAB feeds, and they found that multiple codings gave unacceptable results


on DAB, especially at the low bit rates currently used.


Yes, Serge, I think you should.

I wish there was a law that MADE radio stations here in the US have higher
encoding standards.

Then there's the multiple encode/decodes of XM and Sirius. Do we have any
comments from audiophile XM/Sirius listeners?

Herb Squire(s) did a show and tell at the NY AES a number of years ago
demonstrating the results of multiple, serial compression schemes.

Although compression technology has changed (improved) since then, it's
amazing the see the rabid followers of the HDV video format defend their 384
kbps stereo audio.

Regards,

Ty Ford



--Audio Equipment Reviews Audio Production Services
Acting and Voiceover Demos http://www.tyford.com
Guitar player?:http://www.youtube.com/watch?v=4RZJ9MptZmU