[sdiy] Speaking of the Elektor Vocoder (and the Korg Vocoder)

[Andrew Simper]

As everyone knows already, a BPF with high Q takes a while to decay 
which is totally different from what is going on in an FFT.

Just because you have a single bin in an FFT doesn't mean that this bin 
is it's own "signal" that can be treated independently. The 
contributions from nearby bins makes the signal (for signals that aren't 
an exact multiple of your FFT length). Putting a window around the 
central bin you want to solo will help.

Andrew