matlab - How to Display Audio Information? -


how can display coefficients of audio signal when plotting audio file in matlab?

i new matlab stupid question. have searched similar things haven't come across similar.

first of need read sound. considering have stored in wav format, can use example [x, fs] = wavread('sound_name.wav');. fs sample rate , x matrix of samples [number of samples]x[number of channels]. default read sound in doubles, can changed. see help wavread details. can display raw waveform ploting it: plot(x);. or if need spectrum of sound, can window signal , apply fft. in case voicebox toolbox useful: f = enframe(x, hamming(win_len), fix(win_len/2)); sp = rfft(f.'); imagesc(10*log(abs(sp))); there lots of handy functions in matlab signal processing toolbox.


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