Music is an art form and cultural activity, and its medium is sound organized by time. The general definition of music includes common elements, such as tone, rhythm, dynamics, timbre and texture. Different styles or types of music may emphasize, weaken or ignore certain elements. Music is played with various musical instruments and vocal skills, from singing to rap; There are only instrumental works, only vocal works and works combining singing with musical instruments. This word comes from the Greek word μ ο υ σ κ _. See music glossary.