Ok I got it working routing it through USB 1/2 but now when recording in Audacity it records fine for say 30 seconds and the audio goes all weird and crackly/digital sounding. I am recording at 44Khz 24bit. Any idea why its doing this, tried several tracks from USB all run through rekordbox and purchased from Beatport.
Tried about 10 times and each recording bumps out at random times but all under a minute.
MBP 2.4GHz 4Gb ram late 2009 edition.