Matlab Audio FFT at given times

Dear Matlab-Community,

I need to be able to load an audio file, compute an FFT at a given time and extract frequency and peak amplitude in a certain frequency band.

[y1,fs]=audioread('Audio 12.wav')

t=linspace(0,length(y1)/fs,length(y1));

Nfft=2048;

f=linspace(0,fs,Nfft);

X1=abs(fft(y1,Nfft));

plot(f(1:Nfft/2),X1(1:Nfft/2))

xlabel('Frequency');

ylabel ('Power');

title ('FFT Spectrum');

Thanks for any help!