Software Audio Signal Generator

Messages
2,783
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
 

Bussman

Member
Messages
2,822
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.
 
Messages
2,783
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.

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.
 

Bussman

Member
Messages
2,822
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.
 
Messages
2,783
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.

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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