[sdiy] Re: [Fpga-synth] Hello! and an Idea!

[JH.]

>Well, just to be a bit nasty to your nice little discussion... using FFT on 
>a
>transient signal (and transient responce) is actually making a gross
>oversimplification of the signal and transient responses and hence the
>artifacts.

I think that performing any Fourier-like transformation on a slice of
audio signal "asumes" that the same material is repeated infiniely (cyclic),
and creates the Spectrum accordingly. (What else could it do, not knowing
what's outside that slice?)
But I _thought_ with making the slices twice as long, giving 50% overlap
with both, preceding and following slices, and applying a window function,
allows to get rid of these artefacts. Or so I've heard. I have no idea if
a perfect emulation of time domain convolusion is possible by that, or just
an approximation; and neither do I know how much extra processing power
is needed to achieve this. So just take it as hearsay from my side; but I
think I read it's done that way in commercial convolution boxes.

JH.