| Term | Description | 
|---|---|
| Unison | In music, a unison is an interval, the ratio of 1:1 or 0 half steps and zero cents. Two tones in unison are considered to be the same pitch, but are still perceivable as coming from separate sources. | 
| Upbeat |  1. An unaccented beat or beats that occur before the first beat of a following measure.  2. An anticipatory note or succession of notes occurring before the first barline of a piece, sometimes referred to as an ‘upbeat figure’, section or phrase. 3. The upward stroke made by a conductor to indicate the beat that leads into a new measure.  | 
| Uvular fluttertonguing | Uvular fluttertonguing is a wind instrument technique where the instrumentalist performs and uvular trill to produce an effect like that of fluttertonguing. Uvular fluttertonguing is used when an alveolar trill cannot be produced. | 
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