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FFT Plot of audio signal (MATLAB)

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mehboob_iiui

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plotting of audio signal

consider the following Matlab code:

y=wavrecord(5*11000,11000,'double');
yfft=fft(y);

% now I want to plot yfft such that I get frequency on the horizontal
% and amplitude on vertical axis

% I have tried
stem(yfft);
stem (imag(yfft),real(yfft));

but they donot give the required results...
 

sanbaba

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write like this.

y=wavrecord(5*11000,11000,'double');
yfft=fft(y);
freqz(yfft);

you'll get both the magnitude and phase.

Bye
sanbaba
 

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