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function generator from pc audio port
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OwaisAhmed:
i don't have function generator or oscilloscope but i was looking for some sort of thing that can provide regulated high freqency sinewave or square wave so i thought about this idea. i just wonder if there going to be any problem using this method as a signal.
jonovid:
IMO any pc audio port is only good for 40Hz up to 15kz and sine wave at best.  basic audio work
try to get better if you can

go to 4:19 on the video
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or
ordering from china if you can?
many kit type function generators on alie-xp

really need to know the type of work this is for  ie hi fi  or low fi   :-//

others may have better suggestions
tunk:
What do you mean by high frequency?
Is this any help: https://youtu.be/Y1KE8eAC9Bk
NiHaoMike:
Take a look at fl2k for a $5 3 channel AWG that can go up to 70MHz or so.
tooki:

--- Quote from: jonovid on January 30, 2022, 10:34:25 am ---IMO any pc audio port is only good for 40Hz up to 15kz and sine wave at best.  basic audio work
try to get better if you can

--- End quote ---
Where do you get those numbers from? A standard 44.1kHz/16-bit audio output supports 20Hz-20KHz. Nor are non-sinusoidal waves a problem at lower frequencies. If the goal is audio work, then it's fully sufficient to match human hearing. (Since the bandwidth limits of the audio output are better than those of human hearing.)
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