Further manipulation of spectrum analysis?

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miserybob
Posts: 4
Joined: Thu Jul 20, 2017 2:48 pm
Operating System: Windows 10

Further manipulation of spectrum analysis?

Post by miserybob » Thu Jul 20, 2017 2:58 pm

Win10, Audacity 2.1.3

New user, using Audacity to do a Trevor Gore-type analysis on an acoustic guitar.

It looks like I'm getting useful information recording multiple taps on the guitar body and then using the Analyze>Plot Spectrum tool. The problem is that I'm getting too much information in the very high and very low frequencies. I'd love to be able to focus on the 50Hz - 1000Hz range, but there doesn't seem to be a way to do that in the Frequency Analysis window. Changing the frequency range in Preferences doesn't seem to do anything. Using the two sliders in the Frequency Analysis window is not useful.

Being able to select a section of the graph would be really helpful functionality!

Does anyone export the text file data to another program for analysis? What do you use? Excel jumps to mind, but I was hoping someone had a better alternative.

Thanks!

steve
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Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu

Re: Further manipulation of spectrum analysis?

Post by steve » Thu Jul 20, 2017 3:24 pm

Plot Spectrum uses FFT analysis, which is an "all or nothing" kind of thing, in that the analysis will always be from DC (0 Hz) to half the sample rate (the Nyquist frequency).
I agree that it would be useful to be able to zoom in on the data.
When I need to do that sort of thing, I use GnuPlot http://www.gnuplot.info/
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)

miserybob
Posts: 4
Joined: Thu Jul 20, 2017 2:48 pm
Operating System: Windows 10

Re: Further manipulation of spectrum analysis?

Post by miserybob » Thu Jul 20, 2017 4:39 pm

Thanks, Steve, for the response! I'll check out gnuplot.

Trebor
Posts: 9962
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows 8 or 8.1

Re: Further manipulation of spectrum analysis?

Post by Trebor » Thu Jul 20, 2017 5:20 pm

miserybob wrote:Changing the frequency range in Preferences doesn't seem to do anything.
Those are spectrogram view settings , which is different from plot spectrum ...

Image
Audacity spectrogram-view settings.

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