Recently I bought my new Macbook Pro. It runs perfectly, I can't find anything wrong with it. However, when I use my noise canceling skullcandy headphones when using garageband (specifically when switching between different instruments) I get a very loud and even painful burst of noise. It resembles that of a frequency locator, except more obnoxious.

My set up is a Roland SH-201 usb to usb and (the most recent) macbook pro with standard garageband and added remix tools jampack.

I would very much appreciate some help. I love making music but this noise really hurts!