Todd Coolman, in his book, The Bottom Line, makes the useful distinction between "ping" (attack) and "ring" (sustain). He suggests placing the right hand primarily within the area of 3 inches from the bottom of the neck in order to obtain the best "ping" and "ring". He says you can obtain more sustain by plucking higher on the fingerboard and more attack by playing lower to the bottom of the fingerboard. I am wondering if this distinction is true, since Ray Brown has great "ping" and amazing "ring", while playing primarily at the very bottom of the fingerboard. While Percy Heath has a good balance of both "ping" and "ring" as he tends to pluck much higher on the fingerboard. What do others suggest as the best place for the right hand?