Originally Posted By: jcland
I purchased a Focusrite Scarlett 2i4 interlace last week which replaced my old Line 6 UX2 and I immediately noticed a high pitch whine and a low pitched motor boating noise at high gain.


Check to make sure everything is using 24 bit. May not be your problem, but when I purchased a Scarlet 8i6, I had Sony Acid Pro set to record at 16 bit - the noise was unbearable. Set to 24, that went away.