AW: [sdiy] MIDI over Ethernet (was Microchip DSP kit $60 > AVR32)

[Neil Johnson]

From: Ullrich Peter <Peter.Ullrich at kapsch.net>
> >> Unless you spend $$$ on special boxes you don't get isolation on USB,
> >> so ground loops and noise-sharing via common grounds start to be a
> >> problem again.
> >
> >Thanks Neil. If you combine the lack of isolation with the fact that
> >you're probably connecting your USB MIDI to a computer with the usual
> >atrocious switched-mode power supply, it seems like noise might be
> >quite a problem.
> 
> Adding iCouplers from Analog Devices could help here.
> Galvanic isolation up to 100Mbit/s - they work really fine!

So that limits you to 12Mbps on USB1.1.  If you want High Speed you'll need 480Mbps, or faster, isolators.

Neil
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