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Wikipedia: Baritone - http://en.wikipedia.org/wiki/Baritone
Defines the singing range as lower than tenor but higher than bass, with subclassifications including lyric, bel canto and dramatic. |
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Wikipedia: Soprano - http://en.wikipedia.org/wiki/Soprano
Lengthy article describes vocal quality and typical range for subtypes from coloratura to dramatic, with a list of soprano roles in the operatic and musical theater repertoire. |
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(Un)official Countertenor Homepage, The - http://www.medieval.org/emfaq/performers/countertenors.html
Directory of mini biographies of countertenors. Other music links. |
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Voice Definitions and Ranges - http://www.medieval.org/emfaq/misc/voices.html
Explains how the names of polyphonic parts were adapted to identify voice types, with emphasis on the tenor and countertenor. |
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Special Considerations in the Training of the Bass Singer - http://www.voiceteacher.com/bass_voice.html
Page from VoiceTeacher.com defines differences between basso profundo, basso cantablie (or lyrical bass), and bass-baritone. |