Re: [LAU] Galvanic isolation (was: Re: pianos with built in recorders?)

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. 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.