Meh - he was never known for his high notes.
Ershtenz, it's a joke.
Tzveitenz, quite clearly the oilam agrees on the meh.
Dritinz, MBD could absolutely nail incredible notes. In our circles, people tend to obsess over hitting notes without caring if that's actually pleasant to listen to. So yeah, maybe people didn't think of MBD as the guy who could "hit the high notes", just because there may have been others who were popping their veins hitting higher notes while sounding like mad-cow-infected chickens.