On Wed, Dec 01, 2010 at 03:13:03PM +0300, Andrew Gaydenko wrote: > Fons, I want just polinomial transformation regardless harmonics at all. I > have mentioned harmonics as a result of searching a LADSPA plugin related to > my needings.
Then what is your question ? All you need to do is compute the polynomial for each input sample. > 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. Ciao, -- FA There are three of them, and Alleline. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
