One Problem with fft command TRIANGLE PLOT?
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![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/163312/image.png)
I have taken the fft of a sound file, but it does not show the sinusoidal signal it show some triangles,I put the image of the plot above, what should I do to make it sinusoidal, anyone can help?
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