What is a long sustained note?

A long sustained note is a musical note held for an extended duration, often creating a sense of tension, resolution, or emotional depth within a piece. It can serve as a focal point in a composition, drawing attention and enhancing the overall atmosphere. Sustaining a note can involve techniques such as vibrato or dynamic changes to add richness and expressiveness. In performance, it often requires skillful breath control or instrument technique to maintain the pitch and quality over time.