The nonprofit Guarneri Hall in downtown Chicago is set to present “Pierrot Unmasked.” The concert series, which explores the poetic and theatrical context of Arnold Schoenberg’s seminal melodrama, “Pierrot Lunaire” will be shown on Dec. 9 and 10 2024. “Pierrot Unmasked” presents two different performances around the tragic-comic character Pierrot from Commedia dell’Arte, one with a reading of Albert Giraud’s {…}