Certainly all of the USB MIDI connections I have ever tested, are not galvanically isolated; I always get trouble with USB signals bleeding over where they don't belong. USB-to-DIN adapters I have used have been better, but not perfect. Is there a make/model of USB-to-DIN (or even PCI-to-DIN if it exists anymore) which you know for sure has opto-coupling? That would be a great boon to me. Sooner or later I'm going to do optocoupling for audio too, probably using a TOSLink setup.USB MIDI has got the risk to cause noticeable MIDI jitter. Does USB MIDI provide galvanic isolation? Several times I read claims that USB MIDI connections aren't galvanically isolated. Standard MIDI connectors make usage of opto-couplers and shield of the MIDI DIN connectors is open. J.E.B. --
Jonathan E. Brickman jeb@xxxxxxxxxxxxxxxx (785)233-9977
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