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I Made
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What function to display the result of wavread?

Asked by I Made
on 25 Feb 2013

[x,fs] = wavread('E:\Example\tes.wav');

if i use plot(x); there will be a graph of sine wave.

But the display i wanted is in array of the data/sample data or something?

Anyone know what function should i use?

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1 Answer

Answer by Walter Roberson
on 25 Feb 2013
 Accepted answer

Do you mean like

x(1:100,1)

to display the numeric values of the first 100 samples?

  3 Comments

I Made
on 25 Feb 2013

wow yeah that's great, and how do display it all? not only the first 100, and what is these -0,xxx and 0,xxx mean? are these number represent the frequency over time? could you give me some explanation?

To display all of it, at the command line command

x

(just the name of the matrix.) Remember, this can come out as a lot of output!

The values you will see will be the samples normalized to the range [-1, +1) [that is, -1 exactly is allowed but not +1 exactly). The samples have no absolute meaning; they are relative to the capabilities of whatever equipment will be used to play them.

I Made
on 25 Feb 2013

I'm trying to apply haar filter to it not in matlab, but in java. Since java doesn't have the method(wavread) or (haar filter) i need to make sure what is it the output of wavread so i can make the same function to get the same output. In some books i read we need the frequency over time of signal to be processed ( i don't know if that's even true ) this is why i guess the output of the wavread function is the frequency over time. But i expect the value are like some decimal number but it is not.

I'm really confused about what to take from the wav files so i can process it with haar filter ?


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