Gents,
Wanted to do some electrical measurements (FFT) using the sound card of my li'l travel companion Samsung NC-10. This time higher up but then I found out that the sensitivity rolls off around 6kHz (-6dB). Couldn't find any hints on what goes on and whether or how that can be fixed. Any ideas?
The sound card of a larger laptop goes to 23kHz and the desktop to around 21kHz.
some hidden setting that set it for lowpass filtered mic input instead of full bw line input?
-Lasse
That what I am hoping for, that someone knows a secret hook. The sound card and OS settings for these machines are majorly dumbed down compared to the good old days.
The built-in audio systems are unpredictable; especially in the laptops. Use an external USB sound thing; get a reasonably good one. The other reason for using an external sound is that someone will eventually apply full scale AC into it. "Psst-bam!" as the zurgs say. It is better to "psst-bam" just an external card then entire laptop.
Vladimir Vassilevsky DSP and Mixed Signal Design Consultant
On a sunny day (Fri, 20 May 2011 13:19:19 -0700) it happened Joerg wrote in :
It seesm Samsung makes crap these days. My expensive new 3D TV as an example. BTW the audo is s*it too, sound like they cut below 200 Hz. Avoid them.
Can't say that. This netbook is otherwise very nicely made. Samsung is one of the very few companies that managed to do what only Compaq could really do in the old days (roughly 20 years ago): Build a portable computer that can go more than 5h per charge. The Samsung can actually do 8h. That's the most important feature to me and the reason I bought it.
Not much risk here, it's only me who will be using it. Mostly probes will be connected which pick up fields and have no direct connection to anything.
google brough up this:
look at page 38, it says it only has mic input so maybe you need lower your input level
-Lasse
I had very low input levels, the NC-10 simply won't see anything above
6kHz, has a steep roll-off there that almost has to be digital. So maybe there's an "unlatch trick". I can live with the 48kHz sample clock limit but not with the 6kHz roll-off.On the desktop and the other laptop I also used the MIC inputs and both run to well above 20kHz. The other laptop (Durabook) doesn't have line input either (laptops rarely do).
Gents, it's fixed, after a hint from Heiko Nocon in the German NG almost pointed my nose right into it: Realtek settings -> Microphone -> Noise Suppression and Echo Cancellation to off -> full bandwidth.
This should really have been und Audio I/O. Plus I never saw it because they decided to write light blue onto a blue background (oh man ...).
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