Sustain in the context of Balalaika

Ambient music is a genre of music that emphasizes tone and atmosphere over traditional musical structure or rhythm. Often "peaceful" sounding and lacking composition, beat, and/or structured melody, ambient music uses textural layers of sound that can reward both passive and active listening, and encourage a sense of calm or contemplation. The genre evokes an "atmospheric", "visual", or "unobtrusive" quality. Nature soundscapes may be included, and some works use sustained or repeated notes, as in drone music. Bearing elements associated with new-age music, instruments such as the piano, strings and flute may be emulated through a synthesizer.

The genre originated in the 1960s and 1970s, when new musical instruments were being introduced to a wider market, such as the synthesizer. It was presaged by Erik Satie's furniture music and styles such as musique concrète, minimal music, Jamaican dub music and German electronic music, but was prominently named and popularized by British musician Brian Eno in 1978 with his album Ambient 1: Music for Airports; Eno opined that ambient music "must be as ignorable as it is interesting", however, in early years, there were artists that were pioneers in this genre, like Tangerine Dream, Klaus Schulze, Wendy Carlos, Kraftwerk, etc. It saw a revival towards the late 1980s with the prominence of house and techno music, growing a cult following by the 1990s.

In music, a pedal point (also pedal note, organ point, pedal tone, or pedal) is a sustained tone, typically in the bass, during which at least one foreign (i.e. dissonant) harmony is sounded in the other parts. A pedal point sometimes functions as a "non-chord tone", placing it in the categories alongside suspensions, retardations, and passing tones. However, the pedal point is unique among non-chord tones, "in that it begins on a consonance, sustains (or repeats) through another chord as a dissonance until the harmony", not the non-chord tone, "resolves back to a consonance".

Pedal points "have a strong tonal effect, 'pulling' the harmony back to its root". Pedal points can also build drama or intensity and expectation. When a pedal point occurs in a voice other than the bass, it is usually referred to as an inverted pedal point (see inversion). Pedal points are usually on either the tonic or the dominant (fifth note of the scale) tones. The pedal tone is considered a chord tone in the original harmony, then a nonchord tone during the intervening dissonant harmonies, and then a chord tone again when the harmony resolves. A dissonant pedal point may go against all harmonies present during its duration, being almost more like an added tone than a nonchord tone, or pedal points may serve as atonal pitch centers.

Drone music (also known as drone-based music, or simply drone) is a minimalist genre of music that emphasizes the use of sustained sounds, notes, or tone clusters called drones. It is typically characterized by lengthy compositions featuring relatively slight harmonic variations. La Monte Young, one of its 1960s originators, defined it in 2000 as "the sustained tone branch of minimalism." Music containing drones can be found in many regional traditions across Asia, Australia, and Europe, but the genre label is generally reserved for music originating with the Western classical tradition. Elements of drone music have been incorporated in diverse genres such as rock, ambient, and electronic music.

"With or Without You" is a song by Irish rock band U2. It is the third track on their fifth studio album, The Joshua Tree (1987), and was released as the album's lead single on 16 March 1987. The song was the group's most successful single at the time, becoming their first number-one hit in both the United States and Canada by topping the Billboard Hot 100 for three weeks and the RPM national singles chart for one week, with a further three weeks at number two.

"With or Without You" features sustained guitar parts played by guitarist the Edge with a prototype of the Infinite Guitar, along with vocals by lead singer Bono and a bassline by bassist Adam Clayton. The rock ballad originated from a demo recorded in late 1985 that the group continued to work on throughout The Joshua Tree sessions. Ostensibly a song about troubled love, the track's lyrics were inspired by Bono's conflicting feelings about the lives he led as a musician and domestic man.

The ride cymbal is a cymbal of material sustain used to maintain a beat in music. A standard in most drum kits, the ride's function is to maintain a steady pattern, sometimes called a ride pattern, rather than provide the accent of a crash cymbal. It is normally placed on the extreme right (or dominant hand) of a drum set, above the floor tom. It is often described as delivering a "shimmering" sound when struck soundly with a drumstick, and a clear ping when struck atop its bell.

The ride can fulfill any function or rhythm the hi-hat cymbal does, with the exception of an open and closed sound.

Voice activity detection (VAD), also known as speech activity detection or speech detection, is the detection of the presence or absence of human speech, used in speech processing. The main uses of VAD are in speaker diarization, speech coding and speech recognition. It can facilitate speech processing, and can also be used to deactivate some processes during non-speech section of an audio session: it can avoid unnecessary coding/transmission of silence packets in Voice over Internet Protocol (VoIP) applications, saving on computation and on network bandwidth.

VAD is an important enabling technology for a variety of speech-based applications. Therefore, various VAD algorithms have been developed that provide varying features and compromises between latency, sensitivity, accuracy and computational cost. Some VAD algorithms also provide further analysis, for example whether the speech is voiced, unvoiced or sustained. Voice activity detection is usually independent of language.