Some of you may have read the thread I started a couple of weeks ago about having problems getting my old MOTU MTP AV MIDI interface to work with my newer DAW. I had narrowed it down to being something to do with the USB ports on the 2 year old ASRock Extreme X99 motherboard. The MB has several USB ports...both 2.0 and 3.0. Some of you suggested making sure it was plugged into a 2.0 port....which after checking, it was. I could get my MIDI stuff to play thru the MOTU...but it would play for a little bit then lock up for 2-3 seconds. It would then play several notes really fast as if it was catching up from buffering. This would happen about every 15-30 seconds.
So out of curiosity...I plugged a USB 2.0 4 port hub into the same USB 2.0 port on the computer and plugged my MOTU into the hub. And to my surprise...the MIDI plays back perfectly without any hick-ups. I then removed the hub and plugged the MOTU into the same port and it started locking up again.
So...just for future reference...if anyone ever runs into this problem with their older MIDI interfaces.....try running it thru a 2.0 hub.