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Questions tagged [spectrum]

The frequency domain of a wave-like function.

Spectrum refers to the full range of all frequencies of electromagnetic radiation. Spectrum has since been applied by analogy to topics outside of electromagnetic radiation. For a complete discussion, see the Wikipedia Spectrum article

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Astropy Spectrum1D recovering arrays from spectrum

I have to work with an Astropy Spectrum1D array: spectrum = Spectrum1D(spectral_axis= wavelength, flux = field_strength) I need to recover the wavelengths and field_strength to standard numpy arrays so that I can manipulate them (this has to be…
PeterD
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overlay audio volume histogram over static image

I'm actually working to a project for music video generation using ffmpeg. I'd like to know if it's possibile to use ffmpeg itself or a combination of command line component under windows environment to make a visualization of audio spectrum…
Simone Sole
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How to plot graph the intensity versus wavelength for the spectrum?

Need to plot graph the intensity versus wavelength for the spectrum. Also, me need to determine the wavelengths from the graph (the image below): With which program I can do this? I searched in Google program, but they all work with video (example…
Zero149
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obtain the low pass signal and its magnitude spectrum also to plot the inphase and quadrature components of x(t) and the envelope of x(t)[MATLAB]

Unable to obtain the low pass signal and its magnitude spectrum .also to plot the inphase and quadrature components of x(t) and the envelope of x(t). i have attached the question along too. what is the mistake of the code,i have defined…
Nikki
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How to use real kiss_fft for audio analyzer?

I'm attempting to implement kiss FFT real calculations. As I'm sure everyone is aware I'm not the first person asking about kiss FFT here, nor about kiss_fftr specifically. I am fairly new to FFT, but have gotten most of the basics down, and am now…
Daniel Vandermeir
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Audio spectrum visualization normalize loudness countour

I've written an audio spectrum visualizer as you can see on the following screenshot. It works pretty well but the peaks are not really normalized. I think this is caused by this fact: Equal-loudness contour. Does anybody know how to get balanced…
Frank Roth
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Exception from hresult 0x8007007e ERROR for Port.dll in Spectrum Analyzer in vb

Heello I want to implement spectrum analyzer in vb . I googled it and find an open source project. However it has Port.dll file . This is very old dll so this is not work in 64-bit machine. Link: Spectrum Analyzer Is there anybody know how to solve…
donmezburak
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Javascript ROY G BIV Line Spectrum?

I'm fairly new to javascript and I want to make a small line spectrum using html canvas and javascript so that I can later animate it when a button is clicked to show absorbtion lines and such just like in chemistry. I'm just not sure if pure…
user3786596
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Amplitude / Frequency analysis in Matlab

I have a 2D graph that I have created of frequency vs. amplitude as a way to characterize a signal. I am trying to figure out how to write script that takes the WAV I have already imported into MATLAB, and figure out the peaks, the troughs, and the…
user1239087
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Standard deviation in python

This is the spectra I want to analyze. How do I measure the standard deviation excluding the channel where the peak is present? Lets say the peak is present between 30,000m/s and 90,000m/s.
Lidia
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FFT - manipulating phase spectrum information

I wonder if there is any use of phase spectrum, or we use amplitude information for all the tasks avaliable?
Alex K
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Ardunio audio spectrum with C# or equivalent

I have used a msgeq7 chip with an arduino to split audio from a audio jack all connected on a breadboard. I have code which shows the 7 different frequencies with each having a value of 'loudness' that strobes rapidly. I was wondering if anyone…
Conz
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Spectrum Analyzer with Python?

I want to create a music player with Python which uses OpenGL for visualizing the audio spectrum. I already have the 3d engine set up and all I need is to get the spectrum data and feed it to the renderer. I'd imagine it would be a list of numbers…
user975135
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