We might not always approve of him trying to hit high notes, but his Blues attempted extended notes on this current tour is actually pretty damn impressive for a man in his 60s. Fuck, Hagar currently and a lot of other singers could not last a whole concert with how he is belting stuff out to his best ability. Watch him singing and the guy cares, and he is using all he has like each show is the last and his voice though it might not always reach his desired octave, Diamond Dave is not cracking or loosing the force shouting those things out and he is still putting some vibrato at the end, all in an effort to compensate for his lack of an ability to now scream in a high pitch... and dude is using a low growl scream when he can