Some music is written with 'block' chords, some has weaving parts around the tune, and some music has no harmony at all. These are all examples of textures in music.
Polyphony means 鈥渄ifferent sounds or voices鈥. Polyphonic music has parts that weave in and out of each other. Polyphonic music is also sometimes called contrapuntalInterweaving melodic parts, also known as polyphonic.music.
Polyphonic music may contain an element of imitationWhere one musical part copies another. , where one voice or instrument copies what has just been played by another (think of a 鈥渞ound鈥 like London's Burning.)
Imitation
Imitation is where a melody in one part is repeated a few notes later in a different part, overlapping the melody in the first part which continues. For example, a flute may imitate a tune just played by the oboe.
Sometimes imitations contain slight changes to the tune to make it more interesting. These changes might be:
changes in octave - it could be played higher or lower
adding ornaments
playing the same melody in notes of different duration
A fugueA musical form in which parts enter one after the other with the main theme or subject. These build to create a complex contrapuntal texture. is a special type of polyphonic texture. Fugues always begin with a tune that is played on a solo instrument/sung by a solo voice or produced by instruments/voices in unison. This tune is then played by all the other instruments or voices in turn, but not necessarily at the same pitch.