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Subject: Re: Matrix Patching

From: "Paul Schreiber" <synth1@...>
Date: 2000-02-25

I can attest from 1st-hand experience that the 2500 switches suck pond
water. "Crosstalk" is too kind.
Bleedthrough is more like it!

The switches still exist, but are big $$$. Rather, the IC form (Called a
matrix crosspoint switch)
is used (mainly) for video routing. Both Maxim and Analog Devices make them.

The issue is one of "visual feedback", ie with the electronic version,
what's connected to what?
(Bradley & Barlow immediately votes for 64 LEDs in a 8 x8 grid). Actually,
a muxed 8 x 8
would not be so bad IF you limit the routing to the original mechanical
version: 1 in to 1 out.

HOWEVER, the neat thing with the electronic versions is you are allowed to
close ANY and ALL
switches in a row/column (the switches are analog and bi-directional for
most chips. Some video muxes
had definite in/out pins).

Paul S.

----- Original Message -----
From: alt-mode <alt_mode@...>
To: <>
Sent: Friday, February 25, 2000 1:02 PM
Subject: [motm] Matrix Patching

> From: alt-mode <alt_mode@...>
> This is a bit off-topic but I'd like to hear some of the opinions of this
> group.
> Has anyone played around with an ARP 2500 and can talk about their
experiences with
> the matrix switches used for patching? I've heard reports of crosstalk on
the audio
> side but I've also heard that it is very neat and flexible, allowing
> without the mess of lots of patch cables. I wonder if such a thing might
be an
> interesting complement to something like Larry's Magic Bus(tm). There are
> manufacturers that still make the matrix switches these days.
> Opinions anyone?
> Eric
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