Pattern describing a sound or note's changing amplitude over time
Also known as acoustic envelope · ADSR · ADSR envelope · attack, decay, sustain, and release · sound envelope
2 identifiers linking envelope across the web's reference databases
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In sound and music, an envelope describes how a sound changes over time. For example, a piano key, when struck and held, creates a near-immediate initial sound which gradually decreases in volume to zero. An envelope may relate to elements such as amplitude (volume), frequency or pitch.