I have the Audioengine D1 and the only thing that fixes it is plugging it into this
http://www.amazon.com/AmazonBasics-USB-4-Port-Ultra-Mini/dp/B003M0NURK/ref=sr_1_1?ie=UTF8&qid=1371414908&sr=8-1&keywords=amazon+usb+hub
Which forces the D1 to use ehci instead of uhci.
I have the Audioengine D1 and the only thing that fixes it is plugging it into this
http:// www.amazon. com/AmazonBasic s-USB-4- Port-Ultra- Mini/dp/ B003M0NURK/ ref=sr_ 1_1?ie= UTF8&qid= 1371414908& sr=8-1& keywords= amazon+ usb+hub
Which forces the D1 to use ehci instead of uhci.