“Roomful of Teeth is a kind of lab experiment for the human voice. Its eight singers cover a five-octave range, from grunting lows to dog-whistle highs. Three have perfect pitch, all have classical training, and [director Brad] Wells has brought in a succession of experts to teach them a bewildering range of other techniques: alpine yodeling, Bulgarian belting, Persian Tahrir, and Inuit and Tuvan throat singing, among others. Because the group writes or commissions almost all of its pieces, it can create vocal effects that most singers would never attempt.” — The New Yorker