1 Dec
2010
1 Dec
'10
3:21 p.m.
On Wednesday, December 01, 2010 16:33:35 fons(a)kokkinizita.net wrote:
Fons, thanks! It is *that* trick I needed to eliminate my doubts wrt fs/2
products :-) I think SRC is an approriate lib for up/down-sampling.
Andrew
I'm afraid
direct amplitude caculation in accorance with a0...aN will
produce "too fast" signal deviation, resulting in exceeding fs/2 band.
Any non-linear transfer function will do this for some inputs.
If you have an x^N term, anything above Fs/(2*N) will alias.
If you want the nonlinearity without aliasing, you have to
upsample (by a factor N, with N = highest power of x used),
apply the nonlinear function, then downsample.