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An octave is the distance between two musical notes where the higher note has double the frequency of the lower one. In a standard musical scale, it includes eight notes, such as from one 'C' to the next 'C' above it.

In music, a measure is a small section of a piece of music that contains a specific number of beats. It is the space between two vertical lines on a musical staff that helps musicians keep track of the rhythm.

A musical instrument that usually has six strings and a long neck. It is played by plucking or strumming the strings with your fingers or a pick.

A large musical instrument with four strings that is played with a bow. The player sits down and holds the instrument between their knees while playing.

A musical instrument shaped like a long black tube with metal keys. You play it by blowing into a mouthpiece with a single reed to create sound.

An oboe is a musical instrument that belongs to the woodwind family. It has a long, thin body and uses a double reed to create a high, clear, and distinct sound.

A musical instrument made of brass that you play by blowing into it and pressing three valves. It has a bright, powerful sound and is often used in jazz, classical music, and marching bands.

A musical instrument made of a hollow body covered with a tight skin or plastic. It is played by hitting it with sticks or your hands to create a rhythmic sound.

Timpani are large, bowl-shaped drums usually made of copper and played in an orchestra. They are also called kettledrums because they look like big pots and can be tuned to specific musical notes.

A large musical instrument with a row of black and white keys that are pressed to make sound. It produces music by hitting wire strings with small hammers and is used in many styles of music.