How to record sound and do spectral analysis in Matlab ,

>> audiorecorder(8000,8,1);

>> a=audiorecorder(8000,8,1);

>> record(a,10);

>> b=getaudiodata(a);

>> play(b,8000);

Undefined function 'play' for input arguments of type 'double'.

 

>> sound(b);

>> plot(b);

>> e=fft(b);

>> plot(e);

>> plot(abs(e));

>> plot(abs(e));