Old 03-22-2015, 04:13 AM   #1
Sibben
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Default JS Spectrum analyzer and low end?

Look at the image. Why is it that these two show the bottom end so differently? I'm guessing it's because the JS plug cuts the range it displays earlier. Is it possible to change this? Looking through the code I realize it's a bit too complicated for me.

FreqSpec.jpg
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Old 03-22-2015, 05:11 AM   #2
timlloyd
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Primarily because you have the FFT size in the JS analyser set to 512, which is quite low. Span defaults to 2048. Match the FFT size (called block size in Span) and they will look more similar. Span uses a Hanning window and also offers variable averaging, overlap and spectral smoothing which will also make it appear different.
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