[amsat-bb] Re: Measuring the ADC output of a sound card
Simon Brown (HB9DRV)
simon at hb9drv.ch
Sat Jul 28 16:10:54 PDT 2007
The data you get is PCM, you cannot *really* tell if it's clipped but you
can measure the received amplitude and determine whether it's close to the
maximum possible. In a new program I am writing I show this info. The
overload value in DLLCore is something like 90% of the maximum peak signal
which can be returned (I can look at the source if needed).
Can you explain exactly what you want to do and what you want to see?
Simon Brown, HB9DRV
----- Original Message -----
From: "Alan P. Biddle" <APBIDDLE at mailaps.org>
> I am fiddling with a new sound card, and am wondering if there is a bit of
> _Windows_ software which will read the output of a standard audio device,
> and present the data directly? You can almost do this by looking at an
> display, and looking for clipping, but I was looking for a more direct,
> quantifiable reading. Programs using AE4JY's DLL core will tell you when
> you are overdriving it, but that is pass/fail.
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