I did some testing , recorded 4 bars of 16 notes ( from integra 7 ) over usb midi , standard roland integra usb midi drivers .
Did this 2 times , kept the left channel of both recordings ,and aligned the first beat of both recordings .
In some parts there was a midi jitter of 5ms .
Did the same with freeware seq.24 program , never exceeded 1 ms midi jitter .