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how to communicate data with sound card

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how to communicate directly with the soundcard

Hi ...
I want to communicate data with sound card so i want a method of programming to do that ,can i use low level programming in windows 2000 and xp ,if i can, how ???
please help me.
 

data with sound card

The easiest way would be to use standard API calls, or DirectSound.

On transmit, you could have, for example, simple transmission protocol like FSK, where you have just two frequency. One frequency would be a '0' and one would be a '1'. On receive, you could detect the frequency and separate the 0 and 1 from the frequency.
 

Hi ...
Thanks for your guidance ,so i want to use winAPI and i need a complete reference about winapi (this is the first problem) and programming winapi in C# ,please write for me how ?,and write which API i should use ? (and it's the second one),
please help me...
thanks for your attention,
 

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