MVV 1111 - Class Voice I Add to Catalog Portfolio MVV 1111 - Class Voice I Voice production fundamentals: correct posture, use and control of breath, placement and development of tone, diction (vowels and consonants), and vocal expression. May be repeated once for credit. An exit grade of “C” or higher is required for Musical Theater Majors. Terms all, Spring, Summer Classification: A.A. Transferable Hours: 2 May Be Repeated: May be repeated once for credit.