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Measuring streaming audio problem, please help!

Hello,
 
I have two alternative which I want to choose from. Basicly are these alternatives a way to measure audio stream from a device and analyse it.
 
Alternative 1:
I´m using an ActiveX-component in Internet Explorer to play/decode an audio stream.
I want to measure THD, SNR of this audio stream, but my problem is that the sound goes directly to the output of the sound card and I cannot make any measurement of it. Can somebody explain me how to do? (I´m still a rookie in Labview)
 
Alternative 2:
I sending a "http://...." command to a device and it responds with a html code. This code includes a G711/G726 audio stream in binary format. I don´t have a clue how to decode this stream... Can somebody please explain me how to do?
 
Thank you!
 
Best regards,

Mark
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If you have c++ knowledge, you can try to build a dll from this code:

http://home.clara.net/tixy/source/

Hope it helps,

Wiebe.
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