Nope, you're hearing several chains in an 88B, and it creates kind of a harmony. It's a different sound than your typical primary chain running through the bath.
Engine harmonics!!! 2nd only to heat as an engine killer!
I started using the synthetic HD oil, 3 oil changes back and noticed the top end noise increased, so I think I'm going back to fossil oils this coming oil change. Too many distinct sounds to choose from, makes me crazy!! :-)