Hissy noise on Macbook Pro + Presonus Mobile!!
I'm a long time lurker here at Gearslutz and I followed the Firestudio Mobile thread which persuaded me to buy the device!
Now everything is all good except, there's a really annoying hiss!
I'm a real beginner at this stuff - traditionally a keyboardist, I'm switching to a Logic/Mainstage based system.
However, now there's this really annoying high pitched hiss that I hear whenever I use the system!
I'm using a 2008 Macbook Pro (the one right before the unibody design) with the Presonus Firestudio Mobile interface. Now, when I unplug the power from the macbook, the hiss gets alot less audible (it's still there, just at a lower pitch and volume). So I'm guessing it has something to do with the mac's power supply? Which is really weird since I thought the whole reason for getting an external interface is to get it as far away from the computer's noisy environment as possible?? So why is it still affected??
As I mentioned earlier, I am a beginner and don't have a clue on when to even begin to solve this problem! I tried using the AC adapter on the presonus, instead of just using bus power - didn't work.
Anyone have any idea on what to do?
Thank you guys heaps in advance and I look forward to spending some time around here as I start to dive into the more high-tech side of music!!