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Re: About importance of "phase" in sound recognition
May I propose a simple test.
Get out matlab.
Do a 2^20th fft.
In the bin corresponding to 500Hz, your choice of sampling frequencies, put a '1'.
In the bins corresponding to 996 and 1004, put a .25.
Set energy of the time domain signal to something sensible.
Listen to it.
Now, instead of putting in .25 for the 1004Hz tone, put in -.25
Repeat, using the same gain so as to avoid intensity differences.
Listen to that.
Were I allowed to release code, I would include the matlab code to make your life easier. It's not exactly rocket sicence.
To me, at least, they are different sounds.
James D. Johnston (jj@xxxxxxx)
CHIEF SCIENTIST - DTS, Inc.
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