13. Brass: Trumpet, French Horn, Trombone, Tuba, Cornet, baritone horn, euphonium, mute.14. Percussion:Definite Pitch: Timpani, Xylophone, Chimes. Indefinite Pitch: Snare Drum, Bass Drum, Triangle, Cymbals.15. Keyboard Instruments:Piano, Harpsichord, Pipe Organ, Accordion.16. Electronic Instruments:Synthesizer, Computer Music.17.A theme is a melody used as the basis for a musical composition.18.Varied repetition of theme is called variation.19. Rhythmrefers to the ordered durations of sounds and silences.20. Beatis a regular, recurrent pulsation that divides music into equal units of time.21.The organization of beats into regular groups is called meter.22.A group containing a fixed number of beats is called a measure(or bar).23.When a measure has 2 beats, it is in duple meter; we count 1–2, 1–2, and so on:24.A pattern of 3 beats to the measure is known as triple meter.25. Tempo—the speed of the beat—is the basic pace of the music.26.A tempo indicationis usually given at the beginning of a piece. As with dynamics, the terms that show tempo (at the left) are in Italian.