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Two sound cards on one PC?

Discussion in 'Misc Electronics' started by Johan Smit, Oct 6, 2003.

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  1. Johan Smit

    Johan Smit Guest

    Is it at all possible to run two sound cards simultaneously on one PC?
    I would like to couple the audio output from one sound card to the mic
    input of the other PC, and run them simultaneously.
    Thank you
    Johan Smit
  2. Ian Stirling

    Ian Stirling Guest

    Yes, depending on software.
    I have three in my machine. (one is broken and has been rewired as a
    PCI powered amplifier.)
  3. AFAIK, most operating systems do not support this. Of course, if you
    are capable of writing and integrating your own driver software and
    patching the OS, anything becomes possible.

    Harry C.
  4. Johan Smit

    Johan Smit Guest

    Thanks, that sounds interesting.
    What software and sound cards would you recommend?
    Johan Smit
  5. Are you sure about that? Windows 98 doesn't support two independent
    sound cards for me, so please let me in on your secret.

    Then too, how do you select which app talks to which sound card?

    Harry C.
  6. jm

    jm Guest

    Is it at all possible to run two sound cards simultaneously on one PC?
    Is there any reason you want two sound cards and not simply
    a full-duplex card ?
    Since both the input and output of sound cards are buffered,
    all your software needs to do is empty the input buffer when it
    is filled and fill the output buffer quickly enough with the
    processed data.
    I wanted to do this too long time ago, when most sound cards were
    not full duplex, and had a lot of trouble (that was for real time
    audio signal processing/filtering for amateur radio listening),
    but I think nowadays most sound card support full duplex operation.
    I can send a 10-line program for linux which just reads the buffer
    and copies the data to the output buffer (ie no processing).
    Implementing a proper FFT and appropriate filters which run fast
    enough is another story. The program is based on linux's port of
    scope.c, a 10-line program for using your sound card as a slow

  7. Ian Stirling

    Ian Stirling Guest

    Linux, and most any supported card.
  8. Johan Smit

    Johan Smit Guest

    Hi Jean-Michel,
    I was not aware of the existence of full-duplex sound cards.
    I will certainly look into this. Thank you
    Johan Smit
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