FFT Plot of audio signal (MATLAB)

[mehboob_iiui]

plotting of audio signal

consider the following Matlab code:

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

% 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]

write like this.

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

you'll get both the magnitude and phase.

Bye
sanbaba