John has included copies of the ICMC papers on his site:

http://www.bath.ac.uk/~masjpf/MusPapers.html

The second one (...'Excitable regions') is the most relevant to nlfilt.
How theoretical it all is is a moot point.

Richard Dobson

Gabriel Maldonado wrote:

> Please, where can I get informations about 'nlfilt' theory more
> detailed
> than in csound manual? Is it possible to get them from the Internet?
>
> (
> the manual says 'nlfilt' implements the filter Y{n} = a Y{n-1} + b
> Y{n-2} + d Y^2{n-L} + X{n} - C described in Dobson and Fitch
> (ICMC'96).
>
> )
>
>