In music, sustain is a parameter of musical sound over time. As its name implies, it denotes the period of time during which the sound remains before it becomes inaudible, or silent.
Additionally, sustain is the third of the four segments in an ADSR envelope. The sustain portion of the ADSR envelope begins when the attack and decay portions have run their course, and continues until the key is released. The sustain control is used to determine the level at which the envelope will remain. While the attack, decay, and release controls are rate or time controls, the sustain control is a level control.
Read more about Sustain: Differences, Factors Affecting Sustain, Increasing
Famous quotes containing the word sustain:
“Normal life cannot sustain revolutionary attitudes for long.”
—Milovan Djilas (b. 1911)
“What would life be without art? Science prolongs life. To consist of what—eating, drinking, and sleeping? What is the good of living longer if it is only a matter of satisfying the requirements that sustain life? All this is nothing without the charm of art.”
—Sarah Bernhardt (1845–1923)
“I incline to think that the people will not now sustain the policy of upholding a State Government against a rival government, by the use of the forces of the United States. If this leads to the overthrow of the de jure government in a State, the de facto government must be recognized.”
—Rutherford Birchard Hayes (1822–1893)