[sdiy] USB/MIDI ground isolation?

[Colin f]

> > That's quite a bottle-neck, just to avoid USB isolation issues.
> > The minimum transfer rate over USB is about 300 times 
> faster than MIDI.
> 
> So? Use an 8- or 16-times USB2MIDI/MIDI2USB interface if you 
> have issues with more than one machine.

Aside from the further issue that the MIDI2USB stage needs a host-level
adaptor, most devices with a USB MIDI port also have traditional MIDI ports.
My understanding was that the OP wanted the single-cable two-way connection,
and speed advantage of a USB port, without taking a noise hit.
If you lose the plusses, you may as well use the standard MIDI ports.
 
> MIDI was good for 16 channels (and "appropriate" use of 
> controllers and tempo) back then, it doesn't become unusable 
> just because USB is faster (but, when it comes to that, being 
> bulk-messages more jittery in timing).

It doesn't become unusable, but the improved capability of newer technology
makes the limitations of the older stuff painfully obvious.
I try to avoid using a serial MIDI bus for triggering anything more than 8
voices, and ideally less than 3.

Cheers,
Colin f