AudioNode.context

The read-only context property of the AudioNode interface returns the associated BaseAudioContext, that is the object representing the processing graph the node is participating in.

var aContext = anAudioNode.context;

The AudioContext or OfflineAudioContext object that was used to construct this AudioNode.

const AudioContext = window.AudioContext || window.webkitAudioContext;
const audioCtx = new AudioContext();

const oscillator = audioCtx.createOscillator();
const gainNode = audioCtx.createGain();
oscillator.connect(gainNode).connect(audioCtx.destination);

console.log(oscillator.context); // AudioContext
console.log(oscillator.context === audioCtx); // true

• Using the Web Audio API