Ok, here's the status of things. I read several PDFs about Analog Crosspoint Switches/Arrays. And so far I found out that for what I want, the 80 x 80 point matrix, it would cost around 800 USD just for the CHIPs... not good. So my other idea is go back to Multiplexing and see how it affects the sound. So I will order some cheap chips to test this out better. ;-)
The idea gets simpler.
8 modules, each module with 8 inputs and 8 ouputs. So each module will have its own Multiplexer that outputs 8 channels in one signal.
If I want Signal D from Module 2, I just add on each module input, an 8 analog switch to select from which module I want the signal from, and another multiplexer to decode the signal.
Those chips are very cheap, and since they are added by Module, the BASIC machine will be much cheaper. Modules price will raise a bit, but only for those that will have 8 inputs and 8 outputs.
Make sense?
Now I have to test about Audio quality, and check what are the best Multiplexers and Switches for audio x frequency response x noise ...
Another reason to stay away from the "single solution matrix array 100 USD chip" is that here in Brazil is costs 200 USD EACH chip, stupid TAXES... but simpler chips are much cheaper and easier for me to import.
Wk