Elvis range was about two and a quarter octaves, as measured by musical notation, but his voice had an emotional range from tender whispers to sighs down to shouts, grunts, grumbles and sheer gruffness that could move the listener from calmness and surrender, to fear. His voice can not be measured in octaves, but in decibels; even that misses the problem of how to measure delicate whispers that are hardly audible at all.Lindsay Waters, Executive Editor for the Humanities at Harvard University Press, in his essay Come softly, darling, hear what I say.