On Wednesday, December 01, 2010 16:33:35 [email protected] wrote: > > 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.
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 _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
