Trio is generally used in any of the following ways:

• Three musicians playing the same or different musical instrument.
• The performance of a song by three people.
• The contrasting section of a piece in ternary form
• The contrasting section of a march and similar forms, which usually opens at the third strain.

See Also:

• Piano trio (piano, violin, cello)
• String trio (violin, viola, cello)
• Jazz trio (piano, bass, drum kit)
• Clarinet-violin-piano trio (clarinet, violin, piano)
• Power trio (electric guitar, bass guitar, drum kit)
• Harmonica trio (chromatic harmonica, bass harmonica, chord harmonica)

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