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Questions - spectrogram

Determining spectrogram parameters in pylab

I am new to spectrogram and just start to study it by using atmospheric pressure data. The data has a value once a day in timeseries as below. And the total number of the data is 775. So I guess n (le...
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Joe

python

matplotlib

spectrogram

Votes: 0

Answers: 0

How to fix white gaps in spectrograms when converting .wav files to spectrograms in python

I'm trying to convert .wav files to spectrograms using matplotlib (plt.specgram). It worked, but there are some big white lines passing vertically through the spectrogram. I looked at the samples arra...
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Luke Crimi

python

python-3.x

matplotlib

wav

spectrogram

Votes: 0

Answers: 1

Latest Answer

encontered the same problem.don't have a perfect way to solve this.But I did find a way to get rid of the white gaps. Try adding a small random array to your wav/samples. randarray=np.random.randi...
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PKD

python Spectrogram by using value in timeseries

I am new to spectrogram and try to plot spectrogram by using relative velocity variations value of ambient seismic noise. So the format of the data I have is 'time', 'station pair', 'velocity variatio...
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Joe

python

time-series

spectrogram

Votes: 0

Answers: 1

Latest Answer

If you look closely at it, wav data is basically just an array of numbers (sound amplitude), recorded at a certain interval. Note: You have an array of equally spaced samples, but they are for velocit...
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Roland Smith

How to calculate log-frequency spectrogram efficiently?

I'm trying to plot a spectrogram using matplotlib where the frequencies are spaced logarithmically so I can visualize music/piano notes. From what I've found on the web this was the "best way&quo...
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Cooper

python

matplotlib

signal-processing

librosa

spectrogram

Votes: 0

Answers: 1

Latest Answer

An FFT is O(NLogN), with very efficient and optimized implementations available. So computing a log scaled frequency transform would require less memory, but would likely still be O(NLogN) without as...
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hotpaw2

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