good god. know an alternative source for calculating
the
coefficients? Bill?
The classic article, in this context, is
"Digital Waveshaping Synthesis"
Marc Le Brun JAES 1979 April, vol 27, no 4, p250
Daniel Arfib, at the same time but independently, did similar work --
I don't know a reference. I think DiPoli wrote a good overview --
perhaps in Roads "The Music Machine"?
CLM has code both for the table-oriented and polynomial-oriented
approaches. There's an example "brighten" instrument in clm.html.