 Jean-Blaise Martin

Jean-Blaise Martin, full name Nicolas Jean-Blaise Martin (February 24, 1768 in Paris – October 28, 1837 in Tourzel-Ronzières) was a French opera 
singer whose tessitura lay between tenor and baritone, which became later known as "baryton-martin".Jean-Blaise Martin began singing publicly as a child, before his voice broke.