For the benefit of spelling pedants, excerpts from three dictionaries:


vir·tu·o·so      /ˌvɜrtʃuˈoʊsoʊ/ Pronunciation Key - Show Spelled Pronunciation[vur-choo-oh-soh] Pronunciation Key - Show IPA Pronunciation noun, plural -sos, -si

vir·tu·o·so       (vûr'chōō-ō'sō, -zō) Pronunciation Key
n.   pl. vir·tu·o·sos or vir·tu·o·si (-sē)

virtuoso [vəːtʃuˈəusəu] noun — plurals ˌvirtuˈosos, ~virtuˈ