Envelope (music) in the context of "Musical synthesizer"

In music, notes are distinct and isolatable sounds that act as the most basic building blocks for nearly all of music. This discretization facilitates performance, comprehension, and analysis. Notes may be visually communicated by writing them in musical notation.

Notes can distinguish the general pitch class or the specific pitch played by a pitched instrument. Although this article focuses on pitch, notes for unpitched percussion instruments distinguish between different percussion instruments (and/or different manners to sound them) instead of pitch. Note value expresses the relative duration of the note in time. Dynamics for a note indicate how loud to play them. Articulations may further indicate how performers should shape the attack and decay of the note and express fluctuations in a note's timbre and pitch. Notes may even distinguish the use of different extended techniques by using special symbols.

Articulation is a musical parameter that determines how a single note or other discrete event is sounded. Articulations primarily structure an event's start and end, determining the length of its sound and the shape of its attack and decay. They can also modify an event's timbre, dynamics, and pitch. Musical articulation is analogous to the articulation of speech, and during the Baroque and Classical periods it was taught by comparison to oratory.

Western music has a set of traditional articulations that were standardized in the 19th century and remain widely used. Composers are not limited to these, however, and may invent new articulations as a piece requires. When writing electronic and computer music, composers can design articulations from the ground up.

In music, duration is an amount of time or how long or short a note, phrase, section, or composition lasts. "Duration is the length of time a pitch, or tone, is sounded." A note may last less than a second, while a symphony may last more than an hour. One of the fundamental features of rhythm, or encompassing rhythm, duration is also central to meter and musical form. Release plays an important part in determining the timbre of a musical instrument and is affected by articulation.

The concept of duration can be further broken down into those of beat and meter, where beat is seen as (usually, but certainly not always) a 'constant', and rhythm being longer, shorter or the same length as the beat. In serial music the beginning of a note may be considered, or its duration may be (for example, is a 6 the note which begins at the sixth beat, or which lasts six beats?).

A synthesizer (also synthesiser or synth) is an electronic musical instrument that generates audio signals. Synthesizers typically create sounds by generating waveforms through methods including subtractive synthesis, additive synthesis, and frequency modulation synthesis. These sounds may be altered by components such as filters, which cut or boost frequencies; envelopes, which control articulation, or how notes begin and end; and low-frequency oscillators, which modulate parameters such as pitch, volume, or filter characteristics affecting timbre. Synthesizers are typically played with keyboards or controlled by sequencers, software or other instruments, and can be synchronized to other equipment via MIDI.

Synthesizer-like instruments emerged in the United States in the mid-20th century with instruments such as the RCA Mark II, which was controlled with punch cards and used hundreds of vacuum tubes. The Moog synthesizer, developed by Robert Moog and first sold in 1964, is credited for pioneering concepts such as voltage-controlled oscillators, envelopes, noise generators, filters, and sequencers. In 1970, the smaller, cheaper Minimoog standardized synthesizers as self-contained instruments with built-in keyboards, unlike the larger modular synthesizers before it.

In audio engineering, a fade is a gradual increase or decrease in the level of an audio signal. The term can also be used for film cinematography or theatre lighting in much the same way (see fade (filmmaking) and fade (lighting)).

In sound recording and reproduction, a song may be gradually reduced to silence at its end (fade-out), or may gradually increase from silence at the beginning (fade-in). Fading-out can serve as a recording solution for pieces of music that contain no obvious ending. Quick fade-ins and -outs can also be used to change the characteristics of a sound, such as to soften the attack in vocal plosives and percussion sounds.

Robert Arthur Moog (/moʊɡ/ MOHG; May 23, 1934 – August 21, 2005) was an American engineer and electronic music pioneer. He was the founder of the synthesizer manufacturer Moog Music and the inventor of the first commercial synthesizer, the Moog synthesizer, which debuted in 1964. In 1970, Moog released a more portable model, the Minimoog, described as the most famous and influential synthesizer in history. Among Moog's honors are a Technical Grammy Award, received in 2002, and an induction into the National Inventors Hall of Fame.

By 1963, Moog had been designing and selling theremins for several years while working toward a PhD in engineering physics at Cornell University. He developed his synthesizer in response to demand for more practical and affordable electronic-music equipment, guided by suggestions and requests from composers. Moog's principal innovation was the voltage-controlled oscillator, which uses voltage to control pitch. He also introduced fundamental synthesizer concepts such as modularity, envelope generation and the pitch wheel. He is credited with introducing synthesizers to a wider audience and influencing the development of popular music.