BaseAudioContext: метод createStereoPanner()

createStereoPanner()

const audioCtx = new AudioContext();
const myAudio = document.querySelector("audio");

const panControl = document.querySelector(".panning-control");
const panValue = document.querySelector(".panning-value");

// Create a MediaElementAudioSourceNode
// Feed the HTMLMediaElement into it
const source = audioCtx.createMediaElementSource(myAudio);

// Create a stereo panner
const panNode = audioCtx.createStereoPanner();

// Event handler function to increase panning to the right and left
// when the slider is moved

panControl.oninput = () => {
  panNode.pan.setValueAtTime(panControl.value, audioCtx.currentTime);
  panValue.textContent = panControl.value;
};

// connect the MediaElementAudioSourceNode to the panNode
// and the panNode to the destination, so we can play the
// music and adjust the panning using the controls
source.connect(panNode);
panNode.connect(audioCtx.destination);