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How to generate a test wave with software?

Discussion in 'Electronic Basics' started by Guest, Aug 5, 2003.

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  1. Guest

    Guest Guest

    I need to generate a sound signal to test a microphone. I think
    any wave would do i.e. pure sine / square / or anything else.
    I was just thinking that instead of building a circuit to do this
    I could save some time if I can create a sound with my pc
    sound card. Is there any software that can do this?
  2. Bob Masta

    Bob Masta Guest

    The signal generator that is part of my Daqarta shareware
    package can create a huge variety of signals, including
    noise, and can apply various sorts of modulation. The
    current version is real-mode DOS only, so it won't work
    with Windows versions later than 9x. And it only works
    with sound cards or boards I've written a custom driver
    for, which pretty much means ISA-bus Sound Blasters.
    These use the included SB16.ADC driver.

    Or, with no sound card at all you can create an 8-bit
    ladder DAC with a handful of resistors on your printer
    port, using the LPTX driver instead of SB16. 8-bit
    sound is about equivalent to what you would get from
    any lab-type function generator, in terms of distortion.

    The Windows version of Daqarta is in development.
    The signal generator portion is in beta-test, and will be
    released early as a stand-alone. I'll announce it
    here when released, probably in a month or so.

    Bob Masta

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    Shareware from Interstellar Research
  3. Guest

    Guest Guest

    Or, with no sound card at all you can create an 8-bit
    Thanks to all, I found that SigJenny is very suitable.
    B.T.W. since you have mantioned the parallel port,
    I do have one question: Where can I get the pins layout
    of this port, including how to indentify pin 1. Then, which
    pins are the ones I can use to output a "0" or a "1" and
    which pins do I use for input. Then, which assembly
    command to use to output a "1" or a "0" to a pin
    (I think it's OUT 378 but was is the exact syntax)
  4. st

    st Guest has all the connectors pinouts and cables/adapters.

    may also use WAVEGEN for windows to generate your signals (works with xp -
    some other tools don't)

  5. Guest

    Guest Guest has all the connectors pinouts and cables/adapters.

    This is actually what I wanted, so thanks a lot!!
  6. -----------------

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