@audio/synth-envelope

ADSR contour generator (one-shot, known length)

npm install @audio/synth-envelope

import adsr from '@audio/synth-envelope'

ADSR gain-contour generator — attack/decay linear, sustain flat, release exponential-ish. Returns a Float32Array contour to multiply onto any source (gain, filter cutoff, amplitude); one-shot, whole envelope rendered up front (known total length, unlike a gate-driven realtime ADSR).

adsr({ attack: 0.01, decay: 0.1, sustain: 0.7, release: 0.3, duration: 1 })

| Param | Default | | |---|---|---| | attack | 0.01 | Seconds | | decay | 0.1 | Seconds | | sustain | 0.7 | Sustain level, 0..1 | | release | 0.3 | Seconds | | duration | 1 | Note-on length, seconds (release starts here) | | fs | 44100 | Sample rate |

Use when: shaping any generator's amplitude or a filter cutoff — used internally by synth-voice.

Part of @audio/synth — the synth family umbrella.

MIT © audiojs