I don't know what rmb is. Actually, I don't care. I come here to discuss music, jazz especially. What's the problem? I didn't know there had to be ONE place for each discussion. Silly indeed. Anyway, I rate all of Jarrett's grunts as 1 (lowest on the scale) because I barely notice them. I'm listening to the piano interacting with the bass and drums, so I never notice the grunts, honestly. It's only when someone else points it out that I notice it, so they don't bother me.