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Subject: Re: [motm] Re: 2 new Cloud demos w/'expander'

From: groovyshaman <groovyshaman@...>
Date: 2007-09-04

Issues regarding low latency exist for most interfaces. One of the most
reliable-latency interfaces I am aware of is TDM, but we hardly want to
go that route. ;) Regarding Ethernet and latency, the biggest issues
are packet collision/retry when there are many devices on the same
subnet, and latencies introduced by switches & routers. There are
diffserv values that can be used to set packet priorities in switches &
routers. That's how VoIP phones work at all. But we could use a X-over
cable to attach directly to the Cloud and have the entire Enet to
ourselves. From there, latency would only be dependent on the hardware
Enet device implementation and software drivers in the OS - that would
also be true for USB.

In any case, I was under the impression that the Cloud Engine has analog
outputs and CV inputs, not real-time digital data stream ins/outs;
Ethernet would be for programming.

George

> On Mon, 2007-09-03 at 21:15 -0400, groovyshaman wrote:
>> USB == specific device drivers for Linux, Winbloze, OSX, ...
>
> Not necessarily. You could use one of the existing standard low level
> data protocols. I would also worry about reliable low latency packet
> delivery with ethernet. Does data need to move in performance
> real-time? How much data?
>