Messa di voce

Messa di voce [ˈmessa di ˈvoːtʃe] (Italian: placing of the voice) (MDV) is a singing technique and musical ornament most idiomatically on a single pitch while executing a crescendo and diminuendo. It requires sustained control and masterly singing technique. It should not be confused with mezza voce, meaning to sing at half voice or half strength. Messa di voce can also be used as a voice therapy technique.