For instance, a musician can try to balance timbres through instrument selection in order to maintain a desired sound or effect. Balance could also refer to similarities of style or duration in the A sections of a composition in ABA form. A lack of balance can also be used to create a desired effect. A very loud sound in a quiet section might redirect the listener's attention or introduce a different theme or melody. This includes the way places such as meeting halls, classrooms or an outdoor field reinforce, absorb and reflect sound.
Students can explore the many ways acoustics can be changed.
For example, a student could play a drum in an empty closet and then again when it is full of clothing. Transitional material might foreshadow upcoming material or include a change of tonality from major to minor. Transitions might be subtle and difficult to notice initially or very prominent in order to attract attention. Tension and Resolution Tension can be created in music through the use of many different elements. For example, a building of dynamics, a rising of a melodic line, or the use of more dissonant harmony could all lead to an increase in tension.