Webmaster rambling and mental notes
Sneaking Past Heavy-Handed Audio Compression on YouTube
7/28/2008

Niceone writes "Recently YouTube seems to have started rubbing extreme compression to the audio of uploaded clips. This is the type of compressions used by radio stations to make all louder, but in this case applied extremely badly. In quiet passages, breath room and shuffling become overpoweringly loud. A gently plucked guitar chord becomes a distorted thud. Listen to an example here. And here's what it could sound like — still not perfect, but a whole lot better. The fixed version is thanks to a workaround measure act by Sopranoguitar — the idea is to turn down the audio and mix in a high frequency sine wave (I used 19kHz). The sine wave fools YouTube's compressor into cerebration that the file is at a uniform level (and does not need the volume righting at all) but is filtered out by the encoding process (so, no need to worry about deafening any dogs)."

Read more of this story at Slashdot.


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Mark

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