[sdiy] Analog crossbars and backplanes

[Paul Anderson]

Now, isn't this basically a circuit-switched network? We already have circuit-switched networks for audio - though they're obsolete now - used for telephones. Isn't it possible to just borrow from telephone systems and build in better performance?

Sent from my iPhone

> On Nov 9, 2013, at 10:15 AM, "cheater00 ." <cheater00 at gmail.com> wrote:
> 
>> On Sat, Nov 9, 2013 at 3:50 PM, Rainer Buchty <rainer at buchty.net> wrote:
>> I think that an programmable analog crossbar is the better
>> solution in your case. Saves you all the hassles of dealing with high-speed
>> buses and you don't even need tons of ADC/DAC. Plus, scalability is rather
>> easy to achieve.
> 
> Dunno. Is it?
> 
> Let's have a 16-voice modular, with a module that has 6 connections.
> Don't you think this is a mite huge? That's 96 connections per module.
> A reasonably sized modular will have on the order of 100-200 signal
> sources and destinations. So you'd need 16 completely separate analog
> systems that can each manage 100 inputs and outputs and route between
> them. Are there any analog crossbar solutions that do anything on this
> order of magnitude?
> Then, each connection to the main hub must have additional line
> drivers, because we're talking about distances on the order of a meter
> or two.
> 
> If you find something nice, let me know, but the last time we've
> visited this topic on the list, there wasn't anything affordable or
> interesting.
> 
> D.
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