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obbligato

An accompanying melody played by an instrument that fills behind a vocal or another instrumentalist. (Singer Jimmy Rushing once said, "You know the obbligato the horns play behind the singer? Bebop is the obbligato without the singer.")

open voicing

Voicing in which the notes are widely spread

organ chords

Basic chords, similar to those used in simple hymns.

ostinato

A melodic phrase that is repeated again and again in the same pitches.

outside/inside, playing

To play outside (or inside) of the expected harmonic framework.

overblowing

A wind instrument technique in which increased air pressure is combined with lip manipulation to extend the range of the horn and produce a variety of tones. (See also multiphonics.)

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