[sdiy] Oscilloscope question

[Tom Wiltshire]

Watch out if you're recording LFO waveforms into a computer to view  
in a sound editor.

I once wasted a couple of hours trying to find out what the hell was  
wrong with an LFO circuit I had on the breadboard before I realised  
that the audio input on the computer (the clue's in the name..) was  
losing everything below 50Hz or so and acting as an effective high- 
pass filter for my LFO waveform. That was the cause of the distortion  
that had been troubling me.

Other sound cards may vary, obviously. (OSCMV? New internet acronym?)

T.


On 21 Feb 2010, at 18:31, David G. Dixon wrote:

>> A PC with a sound card will work, just about any of the audio  
>> recording
>> software could be used.
>> Gold Wave is a good package that allows changing sample quality and
>> modifying playback rates.
>
> Yes, of course!  I've used Cakewalk to look at scope patterns.  I'd
> forgotten about that.
>
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