Detecting DTFM

Discussion in 'C++' started by Dominik Susmel, Sep 13, 2004.

  1. I'd like to take in a stream of audio from sound card (linein - but that
    doesn't matter), and process that stream to detect DTFM tones, and output
    accordin numbers - in real-time, ofcourse..
    Anyone knows if there is a library for that (open-source or otherwise),
    since it's a common issue... or atleast a direction where tolook for
    information...I've been googling with not much success, and I have no audio
    programming expirience whatsoever (I'm a graphics programmer) :/ Lib should
    be Win32 compatible, with preference for Linux also, but goal is for Win32

    thanks,
    --
    Dominik Susmel | art director
    www.vongestern.com | vonGestern art company . Zagreb, Croatia
    Dominik Susmel, Sep 13, 2004
    #1
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  2. "Dominik Susmel" <> wrote...
    > I'd like to take in a stream of audio from sound card [...] Lib should
    > be Win32 compatible, with preference for Linux also, but goal is for Win32


    Please ask in comp.os.ms-windows.programmer.win32
    Victor Bazarov, Sep 14, 2004
    #2
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  3. Dominik Susmel wrote:

    > I'd like to take in a stream of audio from sound card (linein - but that
    > doesn't matter), and process that stream to detect DTFM tones, and output
    > accordin numbers - in real-time, ofcourse..
    > Anyone knows if there is a library for that (open-source or otherwise),
    > since it's a common issue... or atleast a direction where tolook for
    > information...I've been googling with not much success, and I have no
    > audio programming expirience whatsoever (I'm a graphics programmer) :/ Lib
    > should be Win32 compatible, with preference for Linux also, but goal is
    > for Win32


    I suppose you can use one of the free available FFT libraries (e.g.
    http://www.fftw.org/)to transform the signal and then the discrete DTNF
    tones should be easily detectable.

    Lothar
    Lothar Werzinger, Sep 15, 2004
    #3
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