With MIDI devices the rule is to try to always plug them into the same USB port. In XP, anyway, there are a limited number (eleven, I think it was) of MIDI ports available and if you plug the same device into two different USB ports at different times it will wind up having two MIDI ports assigned to it, one to each USB port. It appears that this problem was fixed in Windows XP SP3. At least I haven’t encountered it since installing SP3. |