who has the highest pitch of voice Daryl Hall or Steven Tyler 
Daryl Hall: Daryl Franklin Hohl (born October 11, 1946), known professionally as Daryl Hall, is an American rock, R&B, and soul singer; keyboardist, guitarist, songwriter, and producer, best known as the co-founder and lead vocalist of Hall & Oates (with guitarist and songwriter John Oates). Steven Tyler: Steven Tyler (born Steven Victor Tallarico; March 26, 1948) is an American singer-songwriter, multi-instrumentalist, and former television music competition judge, best known as the lead singer of the Boston-based rock band Aerosmith, in which he also plays the harmonica, and occasional piano and percussion.
i don't know