Software Audio Signal Generator

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Nolatone Ampworks, Jan 18, 2008.


  1. Nolatone Ampworks

    Nolatone Ampworks Silver Supporting Member

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    Hey folks,

    Another thing I'm looking into is an audio signal generator. I have an old one but it hurts my head to hook up the oscope and convert millisec to hz, and volts/div, etc.

    Anyone have any experience with the software signal generators? Here's one that looks interesting, and costs $29 from Ebay:

    http://testdisc.vista.com/?mainURL=/store/category/77yp/Audio_Gear_Test_Equipment.html

    Seems easier to deal with and dial in the exact freq and amplitude needed.

    Thoughts on this appreciated.

    Thanks,

    Paul
     
  2. Bussman

    Bussman Member

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    Audacity will generate tones and it's free. Menu "Generate"->choose "Tone" and choose between sine, sawtooth or square, enter amplitude/frequency.

    It'll also generate white noise.
     
  3. Nolatone Ampworks

    Nolatone Ampworks Silver Supporting Member

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    Hey, that's excellent.

    I downloaded and fired it up. The one thing that remains unclear to me:

    Say I want to create a signal 150mv in amplitude. The amplitude setting doesn't specify. I presume 150mv would be .150 in that field. BUT, how does the volume output control need to be set to assure getting that level at the soundcard output?

    I may be splitting hairs here looking a gift horse in the mouth. Maybe not.
     
  4. Bussman

    Bussman Member

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    Yeah the actual amplitude will be dictated by your soundcard's volume level. Generate at 1.00 (max) and monitor the output of the soundcard with a voltmeter. Adjust volume as desired. That's what I do.

    BTW, you can loop your wave by pressing shift when you hit play.
     
  5. Nolatone Ampworks

    Nolatone Ampworks Silver Supporting Member

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    I'll experiment and see what I can come up with.

    It's a great little free program though!

    Thanks for the tip!

    Paul
     

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