matlab,wave files,convolution.....

[cmos babe]

Hi there,I opened 2 wave files(x1 and x2) using Matlab ,x1 is some sound, x2 is x1 but with some effects performed on it using some audio software ...so according to convolution formula x2[n]=x1[n]*h[n] , i perform deconvolution on x1 and x2 to obtain h but the result i got wasn't satisfying...any hints?

 

[Raidum226]

x2 = conv(x1,h);

h = deconv(x2,x1)

or h = ifft(fft(X2)./fft(X1))

 

[cmos babe]

I want to make my purpose more clear, after I get the h[n] I want to use it with other sound signals (convolute it with them) to produce the same effect produced by the audio software.....is this possible?

 

[jetset]

I want to make my purpose more clear, after I get the h[n] I want to use it with other sound signals (convolute it with them) to produce the same effect produced by the audio software.....is this possible?

I think this is not the correct way to do it, every audio effect has different way of woking. Every audio effect has a different algorithm, it's not a simple convolution, you should first understand conceptually how the effect works, to develop the canonical form diagram, and then the filter. A good book to read about this topic is the "Introduction to Signal Processing" of Sophocles Orfanidis... its very interesting.

 

[me2please]

One obvious question is .... how do you know that the effect you performed through software is "a linear operation"? If it's not linear, your convolution formula is not valid in the first place.