👉 Dissheaded is a term used in the context of music notation, specifically within the field of opera. It refers to the process of making a musical instrument or piece of music sound like it was played without any key changes or alterations. In other words, "dissheaded" means that the notes and chords are played on an instrument with no change in pitch or harmony, which is often used for operatic instruments such as the cello, viola, or bass clarinet