How To Detect The DTMF Through The Sound Card

Hi all
This is my university project.
Can anyone tell me how can i get the digit from wave stream with DTMF coming through sound card or standard sound device.
i have to play voice as per caller key press.

Hmm... Well. if it were me I'd Google "java dtmf decode" and hope that someone's already done the work.

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Now I write here how I made something that seems impossible ...
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How To Detect The DTMF Through The Sound Card

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