I've just binned my E4K as a master keyboard (anybody wanna buy one? It sort of works a bit), and have replaced it with an EMU longboard which is a surprisingly handy bit of kit for the cash.
I was running the MIDI out of the E4K into the MIDI in port on my Tascam FW1080, which was feeding stuff to Cubase. Bit laggy, but meh. I coped.
The Longboard is running straight into a USB port and is showing up in Cubase as "USB audio input", which it's supposed to and has thus far been fine.
When I press, say D4 on the keyboard, I'm getting (for example) a random run of notes in no particular timing or tempo followed by a held B5 for example. Very odd. I fired up SX3 and got the same results. I've not changed any MIDI settings, or anything that would otherwise affect this.
I are confused. Which I shouldn't be as it's my birthday.
"We knocked on the doors of Hell's darker chambers..." But no-one answered, so we went to the pub instead.