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Anybody know what kind of algorithms/applications they use for this? Cuz I'm on hold right now and whenever the music overloads the system there's this wicked pink noise distortion that takes over the entire signal. I want to use it on everything.

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up vote 3 down vote accepted

In India, when I was recording localization IVRs, they used A-law 8-bit/8-kHz. I am not sure whether it is the international standard for telecom services. I am sure Europe is A-law algorithm as well and Northern America has u-law (Mu-Law) algorithm.

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I encountered the same specs when looking into audio for phone systems here in NZ, so it sounds like they are pretty standard worldwide. –  James Bryant Apr 20 '11 at 21:46
    
@Rishi, Excellent! Thanks! –  g.a.harry Apr 20 '11 at 22:28
    
@g.a.harry Cheers! –  Rishi Dani Apr 20 '11 at 23:28
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