More about switching

[Paul Perry]

At 03:30 PM 14/08/97 +0200, Haible Juergen wrote:
>

>
>What I never quite understood about switch arrays for VCS3-like
>patching: You need one source going to several destinations,
>and one destination being fed by several sources, both at the
>same time. So:
>
>1) Your array must be able to make more than one connection
>     per column and per row at the same time.
>
>2) To avoid shorting, each connection must have a reasonable
>     *Resistance*. The VCS3 chose the elegant way to place
>     these resistors inside the pins.
>     You could do the same thing with discrete switches and one
>     discrete resistor for each switch - but how would you do this
>     in an integrated mux or even cross point matrix ?? 
>

....maybe a more elegant way would have been to put a resistor on the 
output of each module?

while we are on the VCS3,I think the idea of a square matrix is flawed.
When using a VCS3, i have never needed more than 15 pins, usually
10 or less. 
So, where we have N modules, rather than a 2Nx2N matrix
why not a 2Nx15 matrix where the 15 consists of 15 shorted rows,
like they called "mults" in the good old days.
Do this with 2Nx15 physical or electronic switches, and you would
have a pretty intuitive & ergonomic setup (impressive, too).

a little expensive, though, if we use Batz's $13 switches ;)

paul perry melbourne australia (not florida)

BTW HJ what do Sennheiser use for filters & envelope detectors in their 
vocoder? any ckt hints appreciated.....
"