Yikes! I am not a tech guy, but:
It is " Clipping", I think that it the proper word. I am Running my Darla24 Outs to my mixer, then to the amp. Your tune is causing the LED meters on the mixer to go to the top of the red, and I hear distortion.
As I said, this is not my forte in life. I have played a dozen Mp3s since then , and I do not get this.
Actually I was wrong. I have the tune on now, and the meters are fine, sorry. It is the Bass. When you do the first lick, and the bass and drums hit the first real "Downbeat", it is very distorted.The whole thing is distorted whenever there is heavy Bass and drums. Very odd, it doesnt happen on the other stuff I play.
I have tried it ten times, bigtime distortion. I wish I could help you, I do not know enough about it. Great tune though, great job.