Used to categorize singers' voices in choirs, indicating voice range. When she joined the choir, they tested her range and decided she's an alto.
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Voice Pitch
Refers to the pitch range; alto is lower than a high soprano voice. Alto solos are rare because they require a voice that is both strong and mellow.
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Gender Neutral
Both men (countertenors) and women (contraltos) can sing alto parts. Despite his deep speaking voice, he impresses audiences with his rich alto singing.