MATLAB: Viewing spectrum of an audio signal in matlab

Signal Processing Toolboxurgent

Hello all,

I have an audio signal (.wav) and would like to view its spectrum in matlab. Can anybody help me in this manner?

Thanks in advance.

Best Answer

Read it in with wavread()

[signal,fs] = wavread('file.wav');

If signal is Nx2 (two columns), extract one of them

signal = signal(:,1);

If you have the Signal Processing Toolbox, enter

plot(psd(spectrum.periodogram,signal,'Fs',fs,'NFFT',length(signal)));

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[signal, Fs] = audioread('YourFile.wav');
PLOT = true;
[windowFFT, Freq] = getDFT(signal, Fs, PLOT);
mfccParams = feature_mfccs_init();
ceps = feature_mfccs(windowFFT, mfccParams);

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You can do something like this: If 1 second removed from end:

[Y,FS,NBITS] = wavread('file.wav');  % Your file name

num_samp = round(FS); % Number of samples in a sec

wavwrite(Y(1:end-numsamp), FS,NBITS,'new_file.wav'); % if 1 second removed from end

IF 1 second removed from beginning

   [Y,FS,NBITS] = wavread('file.wav');  % Your file name
    num_samp = round(FS); % Number of samples in a sec
    wavwrite(Y(numsamp+1:end), FS,NBITS,'new_file.wav');

Best Answer

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