< btw. has some1 else made this kind of modules ?
I've made a group of modules (basically the same kind of thing) with a set of synthesis unit (sine, triang, square, fourier additive, amp & freq mods) and a "sampler", both connected to an effects generator (delay, filters, mods). It is in -a kind of- german, but I think it is clear for anyone with a minimum audio experience. You can find it in pure-data.org or directly in http://home.arcor.de/jmmmp/
(If you have any features to suggest, please do. It is stopped now mainly due to lack of imagination and time)
João Miguel Pais