the repeating part of a song that contains the main, catchy melody and lyric.

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music and/or a rhythm that supports the main melody, such as a guitar being strummed while someone is singing, or the left hand on a piano playing certain notes over and over while the right hand plays a melody or improvises. Most accompaniments are grooves of one kind or another.

(1) The volume of a sound, loud soft or in between. (2) The size of a vibration.

music that provides support for the melody.

the notes of a chord played one at a time.

one group of beats. (See the “meter” illustration for an example.) Also called a “measure” — same thing.

the vertical line separating each group of beats. (See the “meter” illustration for an example.)

the main measurement used in music. The pulse of music is made up on beats, and each “pulse” is a beat.

a pentatonic scale with a “blues note” added to it.