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A melody is a sequence of musical notes that are pleasant to listen to and form a main tune. It is the part of a song that people usually hum or sing along with.

In music, a note is a single sound with a specific pitch and length. It also refers to the written symbol on a page that tells a musician which sound to play.

In music, a sharp is a symbol (#) that tells a player to play a note one half-step higher. It also refers to the specific note that has been raised.

In music, a flat is a symbol (♭) that tells a musician to play a note a half-step lower than usual. It also describes a sound or voice that is slightly lower than the correct musical pitch.

The regular pulse or rhythm in a piece of music that you can clap your hands or tap your feet to. It is the basic unit of time in a song that helps musicians stay together.

In music, a bar is a short section of music that contains a specific number of beats. It is shown on paper by vertical lines that divide the musical staff into equal parts.

A time signature is a set of two numbers at the beginning of a piece of music. It tells the musician how many beats are in each measure and which note value represents one beat.

An object that is played to make musical sounds, such as a piano, guitar, or drum. It can also be a tool used by scientists or doctors to do very exact work.

A musical instrument with four strings that is held under the chin and played with a bow. It is known for its high-pitched, expressive sound and is used in many types of music, especially classical and folk.

A viola is a musical instrument with four strings that is held under the chin and played with a bow. It looks like a violin but is slightly larger and has a deeper, lower sound.