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Help me with spectral analysis in Matlab

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puther

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spectral analysis

i used this coding to read a file input manually.
y=wavread('c:\MATLAB7\work\tests')
after this which coding can i use to read the wave file and return signal duration in terms of sample. amplitude vs number of samples.
then choose the samples to be windowed.
exp 1000 to 6000 to be windowed.
must be same wit the function [y,Fs,bits]=wavread('tests',{1000 6000])
plz help me out...
thank you
 

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