#choir performer

• Altist — A singer with an alto voice (especially a boy or a man using falsetto) or a musician who plays an alto instrument, such as a viola player or a performer on the alto saxophone. As an adjective, it describes a timbre, composition, or instrumental register specific to the alto range.
• Alto — A deep female voice or a boy's voice pitched in a register between soprano and tenor (also called contralto); a musical part or score written for this range. It also designates musical instruments with a timbre corresponding to this range (e.g., alto saxophone, alto flute) or, as an adjective, describes such an acoustic register.