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Hello everyone,

I am new to DSP and have been going through Perry
Cook's "Real Sound Synthesis" book. I have been trying
to extend the vocoder example in the book. Basically,
it is an FFT based channel vocoder. I take the FFT of
the two signals, calculate the powers and then do
cross-synthesis. It is all in the source code included
in the book.

However, I want to add some features to it. One thing
that came to mind is to control how much of the two
signals to be included or basically to be able to
specify the ratio between the presence of two signals
in the final output. How should I go about trying to
control this? Can I do something in the frequency
domain? Changing the frequency data seems to just
affect the amplitude once I take the inverse.

Thanks for any help you might give me. This DSP stuff
is hard! :)

Pankaj
	

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