Seattle Opera Dramaturg Jonathan Dean investigates two voice types infrequently encountered in opera: trebles (boy sopranos and adolescent female sopranos) and countertenors. Features conversation with Seattle Opera coach-accompanist Jay Rozendaal, and musical examples: TURN OF THE SCREW (Rafi Bellamy Plaice and Forrest Wu), LAKMÉ (Harolyn Blackwell), THE MAGIC FLUTE (Johanna Mergener, Emili Rice, and Isabel Woods), HANSEL & GRETEL (Sasha Cooke and Ashley Emerson), SIEGFRIED (Juls Serger and Julianne Gearhart), FALSTAFF (Peter Rose), Freddie Mercury, Colm Wilkinson, and Will Oakland, I PURITANI (Luciano Pavarotti and Lawrence Brownlee), Alessandro Moreschi, GIULIO CESARE (Bryn Terfel, Milijana Mijanovic, and Jochen Kowalski singing “Va, tacito” and Brian Asawa singing “L’empio, sleale, indegno”) and A MIDSUMMER NIGHT’S DREAM (Anthony Roth Costanzo).