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.

Drum percussion instruments are usually the instruments with the shortest sustain; a drum beat begins to fade almost instantly. Instruments with the highest possible sustain often involve the passage of air, such as brass or the pipe organ, which have theoretically unlimited sustain. Resonating instruments such as the piano and guitar also have fairly long sustain for string instruments.

Within a family of instruments, sustain is affected by a variety of factors. For example, sustain in guitars is determined by factors including body construction (hollow versus solid), body woods, neck woods, the placing of strings (through the body or atop the body), strings gauge and pickup design.

Toufik Benedictus "Benny" Hinn (Greek: Τουφικ Βενέδικτος "βενι" Χιν, Arabic: توفيق بندكتوس "بني" الحن‎, Hebrew: תאופיק בנדיקטוס (בני) הין; born December 3, 1952) is a televangelist, best known for his regular "Miracle Crusades" – revival meeting/faith healing summits that are usually held in large stadiums in major cities, which are later broadcast worldwide on his television program, This Is Your Day.

Hinn was born in Jaffa, in 1952, in the then newly-established state of Israel to Palestinian Christian parents. He was raised within the Eastern Orthodox tradition.

Soon after the 1967 Arab-Israeli War (a.k.a. "The Six-Day War)", Hinn's family emigrated to Toronto, Ontario, Canada, where he attended but later prematurely left the Georges Vanier Secondary School. In his books, Hinn states that his father was the mayor of Jaffa at the time of his birth, and that as a child, he was socially isolated and was handicapped by a severe stutter, but was nonetheless a first-class student. These claims, however, have been disputed by critics of Hinn. As a teenager in Toronto, Hinn converted from Greek Orthodoxy to Pentecostalism, eventually joining a singing troupe made up of young evangelicals. According to a 2004 CBC report on Hinn, his newfound religious devotion during this period became so intense that his family became concerned that he was turning into a religious fanatic. Hinn was taught the bible and mentored by Dr. Winston I. Nunes of Broadview Faith Temple in Toronto.