The defaultValue read-only property of the AudioParam interface represents the initial value of the attributes as defined by the specific AudioNode creating the AudioParam.


var defaultVal = audioParam.defaultValue;


A floating-point Number.


const audioCtx = new AudioContext();
const gainNode = audioCtx.createGain();
const defaultVal = gainNode.gain.defaultValue;
console.log(defaultVal); //1
console.log(defaultVal === gainNode.gain.value); //true


Specification Status Comment
Web Audio API
The definition of 'defaultValue' in that specification.
Working Draft  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support14 Yes25 No156
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support Yes14 Yes26 No15 ?

See also

Document Tags and Contributors

 Contributors to this page: Jedipedia, fscholz, erikadoyle, chrisdavidmills
 Last updated by: Jedipedia,