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Hello, I am doing a project in a Matlab with using a nntool. I have to recognize separate letters in voice signal with using SOM. I am new to the speech recognition and I want to ask for some help. My idea is that I load a recorded voice signal(a,b,c,d,...) to the Matlab, use floating window with some exact size to determine the part of the signal for processing and than use FFT to transform signal to the form that I can load to the nntool and then work with it. My problem is with the first part of my task, not with using nntool. Thanks a lot for your ideas. Jack