[Cuki79]

Originally Posted by KLB

Hi,

This is very impressive work. I am interested in trying your method of creating and using my own IRs. I follow everything you did with the exception of this statement.

"Then I computed the IR Fourier Transform by dividing the Fourier Transform of both recordings using MATLAB."


I understand converting both wav files to their respective FFTs, but I don't understand why you divided them before doing the IFFT. And did you divide the FFT of the Lyric by the FFT of the microphone, or the other way around.

Thanks so much for the work, and thanks in advance for any help you can provide relative to my questions.

I am an amateur player, and proficient in the use of Matlab and Scilab.

Ok the idea is to compute the impulse response IR(t) that would bring the pickup signal p(t) to the mic signal m(t).

in time domain, m(t)=p(t) x IR(t). Where "x" denotes the convolution product that the pedal or convolution reverb plugin will perform. A convolution product in time domain, is equivalent to a multiplication in frequency domain.
So in frequency domain fft[m]=fft[p].fft[IR]
Here "." Denotes the multiplication and fft, the fast Fourier transform operation.

There is nothing patented here. Both Tonedexter and Fishman patents explain that based on a scientific publication published prior to their patent.

So fft[IR]=fft[m]/fft[pic]

Where " / " denotes the division.

So IR(t)=ifft[fft[IR]]

If you get there and blend, you have the Fishman aura.