Hey , I switch from the emu midi tab1x1 to the m-audio midisport and my amp is working great now. I put the amp in safe mode by holding down channel A on power up and flashed the update and everything is working better than ever. Oh and I also unplugged all other usb devices, not sure if that was necessary its just what I did. The cable is $35 on amazon. Hope this helps good luck.
http://www.amazon.com/M-Audio-Midisport-Uno-MIDI-Interface/dp/B00007JRBM/ref=sr_1_1?ie=UTF8&qid=1427211992&sr=8-1&keywords=m+audio+midisport
