Tucanchu on EZKeys Grand - Distortion

Hello, is it just me or are others experiencing "slight distortion" when playing the midi files (doesn't matter which one) in EZKeys Grand? Its the oddest thing. No clipping, but there definitely is a hint of distortion. I am using Cubase 8Pro, and all my other VST instruments sound fine. I would really appreciate hearing your experiences, and certainly a solution would also be very much welcomed. Thanks