From jaw-dropping low notes to whistle-register highs, these vocalists pushed the human voice to astonishing extremes across genres and generations. Vocal range has long been one of the most ...

Lend me your ears : phonotation of words in range of 7 octaves : female voice --Duet in new vocal sound range -- Boy's voice --Four & five octave leaps on the word "viola" -- Double & multiple ...