Hello all,

Upgraded to a Babyface after using a M-Audio Fastrack Pro for years, and it's been one of the best decisions I've made. One problem though: whenever I connect any of my instruments through the guitar DI port, I get a horrible buzzing sound that's exacerbated with the use of high gain guitar amp sims. I'm plugged into a Mac Pro tower and have KRK Rokit 8s plugged into the device, and that's it. I switched the Mac Pro to its own outlet on the wall and yet I'm still getting this horrible buzzsaw noise. I'm unable to do freelance guitar work because of it because my guitar and bass tones are unuseable. I've switched chords, switched instruments, same buzzing.

Any help/info how to solve this problem would be greatly appreciated; troubleshooting tech problems was never a strong point of mine.

Thank you!