Composition
A piece of music.
Texture
The way the parts of the composition are combined.
Forces
What type and how many instruments are used in a composition.
Homophonic
One main part supported by an accompaniment.
Polyphonic
Two or more main parts played together.
Monophonic
One main part, alone, or in unison.
Unison
Two or more instruments or voices playing the same part.
Accompaniment
Music that supports a main part; also known as background music or sound effects.