switching matrix

[Kevin Lightner]

>Hi!
>
>does anyone know if there exists a way to build some kind
>of 'switching matrix' that allows you to make connections
>between about 500 analog audio-lines ...
>
>I'm thinking about a digital patchbay for a modular ...


Take a look at the Harris CD22M3494E. Mitel makes a similar unit.
The chip has great specs and has 128 analog switches arranged in a 16 x 8
matrix.
It has a "clear all" pin and internal latches.

-Kevin

http://www.synthfool.com