I feel silly requesting help with such a relatively simple device, but for whatever reason, it seems to be having serious "clipping" issues with my Macbook Pro. I'm not sure that's the proper term. What I mean to say is, the audio will randomly cut out completely for a second or two, like when a CD skips. Once, it even started "chopping up a track," sounding much like someone fast forwarding through a CD. I tried using the audio MIDI setup ap to lower the sampling rate, but to no avail. I will say that I suspect that the problem has to do with the native USB port of the Macbook Pro not being able to provide sufficient power the Sidewinder D7 for prolonged periods of time, with its mere 0.5 Amps of USB bus power. The Sidewinder starts off sounding great, and powering my K701s no problem, but after 20 minutes or so, it starts to "skip" as I have described. I have ordered an externally powered USB hub (with an output of 2.5 Amps), so we'll see if that clears things up. I was curious if anyone else had this problem, though, and could give me advice. Is it possible my D7 is simply defective? It seems to have a hard time even recognizing that it's plugged into the USB port at times. Thanks in advance for any help.