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Anonymous
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MP3 Format for Lo-Fi (vs Hi-Fi) Source Material
      #1025484 - 21/12/12 06:24 PM
Hello, I'm just wondering (checking really) if MP3 encoding affects hi-fi more than lo-fi recordings in any way.

I don't know why this would be the case, but I remember FirstSounds, who released the first known phonautograph recording of a human voice, answered a request for [.wav] file versions by stating that it would not offer any improvement in audio quality than the [.MP3] download on their site.

Is this (objectively) the case or merely a subjective claim based on what they'd expect most people to notice? I mean, if someone wanted to try to 'restore' or bring certain elements of the recording out, wouldn't they be better off using a high def [.wav] file?


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narcoman
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Re: MP3 Format for Lo-Fi (vs Hi-Fi) Source Material new [Re: ]
      #1025490 - 21/12/12 06:38 PM
they were fobbing you off!!!


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Anonymous
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Re: MP3 Format for Lo-Fi (vs Hi-Fi) Source Material new [Re: narcoman]
      #1025492 - 21/12/12 06:41 PM
It wasn't me who asked, it was either a comment or a FAQ, can't remember.


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Anonymous
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Re: MP3 Format for Lo-Fi (vs Hi-Fi) Source Material new [Re: ]
      #1025493 - 21/12/12 06:44 PM
Found it...

http://firstsounds.org/faq/

Q. Can I get uncompressed versions of your recordings without losses due to mp3 encoding?

A. Our experiments have shown that the 128 kbps mp3 files available on FirstSounds.org are more than sufficient to convey all audio information in the original phonautograms.


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Hugh RobjohnsAdministrator
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Re: MP3 Format for Lo-Fi (vs Hi-Fi) Source Material new [Re: ]
      #1025494 - 21/12/12 06:57 PM
Quote:

Our experiments have shown that the 128 kbps mp3 files available on FirstSounds.org are more than sufficient to convey all audio information in the original phonautograms.




Technically, this is inaccurate. Lossy audio codecs inherently throw away some audio information.

However, the information thrown away may well be inaudible and irrelevant given the inherently poor quality (in relative terms) of the source -- ie. the stuff thrown away might well just be noise elements.

H

--------------------
Technical Editor, Sound On Sound


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Anonymous
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Re: MP3 Format for Lo-Fi (vs Hi-Fi) Source Material new [Re: Hugh Robjohns]
      #1025496 - 21/12/12 07:26 PM
Thanks for that. It's quite interesting too.

Is it possible to determine if those elements thrown away are pure noise? I don't suppose it's possible to separate noise (using a noise reduction tool?) and apply compression to those elements more than 'wanted' sound...?


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Hugh RobjohnsAdministrator
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Re: MP3 Format for Lo-Fi (vs Hi-Fi) Source Material new [Re: ]
      #1025515 - 21/12/12 10:58 PM
Quote Josif A. Soterίou:

Is it possible to determine if those elements thrown away are pure noise?




Yes, but only by comparing the mp3 file with a full resolution wav file, in a null test.

Hugh

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Technical Editor, Sound On Sound


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