I well remember the incredible power and resonance of the un-amplified voices of May Martin, Ethel Merman, Alfred Drake, Robert Preston, Barbara Cook before musicals had microphones. Martin, Merman, and Drake gave particularly strong and vibrant live performances. I also remember the power of the amplified voices Barbra Streisand, Patti Lupone, Richard Kiely, Robert Preston, Bernadette Peters, Angela Lansbury, Mandy Patinkin all of whom sounded better live than on recordings. Nowadays, with the amplification so manipulated with reverb, it is hard to tell the quality of the singers filling the room with their own sound. Many of today's singers are far better trained, but we seldom get to hear their natural voices in theaters or even nightclubs.