[sdiy] Cyclone SID

[Rainer Buchty]

>This is probably way off, but I read in some electronics magazine that 
>FPGA-like programmable _analog_ chips (and hybrid chips) are getting 
>more and more powerful these days (and they use them for stuff like 
>mobile communications equipment or something so they could even be 
>cheap). I've never seen any, but perhaps something like that could be 
>used for a more true SID design?

I wouldn't put too much hope into FPAAs or how they are called today.

The nice thing of CPLDs and FPGAs is that you can put arbitrary digital 
functions into it -- and a gazillion of them which would otherwise fill 
an entire cabinet of e.g. 74xx/40xx.

The FPAAs I've seen so far do not live up to those expectations but 
remind more of a more or less configurable gain cell. Also, you will 
most likely always need external components as tunable Cs and Rs 
(especially over several orders or magnitue) are pretty much impossible 
in silicon (or at least prohibitively expensive).

However, I'd love to stand corrected here...

Rainer