29 Nov
2005
29 Nov
'05
2:20 p.m.
I think the standard way of convolution - or at least the one I use - which gives ok results, is to have one 'carrier' signal, which is filtered by the 'modulator' signal. (I think that's what they're called.) Basically, first get the magnitude of the modulator: sqrt(real^2 + imag^2). Then:
output real = carrier real * modulator magnitude output imag = carrier imag * modulator magnitude
The outputs go into a [rifft~].
Remember, both carrier and modulator must be windowed first, e.g. with hanning, and you must overlap-and-add by a factor of 4. Good block sizes are around 4096, e.g. [block~ 4096 4].
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