The close() method of the AudioContext Interface closes the audio context, releasing any system audio resources that it uses.

This function does not automatically release all AudioContext-created objects, unless other references have been released as well; however, it will forcibly release any system audio resources that might prevent additional AudioContexts from being created and used, suspend the progression of audio time in the audio context, and stop processing audio data. The returned Promise resolves when all AudioContext-creation-blocking resources have been released. This method throws an INVALID_STATE_ERR exception if called on an OfflineAudioContext.

None.

A Promise that resolves with undefined.

The following snippet is taken from our AudioContext states demo (see it running live.) When the stop button is clicked, close() is called. When the promise resolves, the example is reset to its beginning state.

stopBtn.onclick = () => {
  audioCtx.close().then(() => {
    startBtn.removeAttribute("disabled");
    susresBtn.setAttribute("disabled", "disabled");
    stopBtn.setAttribute("disabled", "disabled");
  });
};

• Using the Web Audio API
• Web Audio API