New audio javascript

Here are some examples of new audio-related JavaScript features and APIs:

1. Web Audio API: This API allows you to create and manipulate audio in the browser. You can use it to create audio effects, generate audio, and more.

Example:

const audioContext = new AudioContext();
const oscillator = audioContext.createOscillator();
oscillator.type = 'sine';
oscillator.frequency.value = 440; // 440 Hz
oscillator.start();

2. MediaStreamAudioDestinationNode: This API allows you to capture and manipulate audio from the user's microphone or other audio sources.

Example:

navigator.mediaDevices.getUserMedia({ audio: true })
 .then(stream => {
    const audioContext = new AudioContext();
    const destination = audioContext.createMediaStreamDestination();
    stream.getAudioTracks()[0].connect(destination);
    const audioBuffer = destination.stream.getAudioTracks()[0].getBuffer();
    // do something with the audio buffer
  });

3. WebVTT: This is a format for adding timed text and other metadata to audio and video files.

Example:

const webVTT = new WebVTT();
webVTT.addCue(new WebVTT.Cue('Hello, world!', 0, 2));
webVTT.addCue(new WebVTT.Cue('Goodbye, world!', 2, 4));
const audioElement = document.getElementById('audio');
audioElement.addEventListener('loadedmetadata', () => {
  webVTT.parse(audioElement);
  // do something with the parsed WebVTT data
});

4. AudioContext.createMediaElementSource(): This method allows you to create a MediaElementSourceNode from an HTMLMediaElement, such as an <audio> or <video> element.

Example:

const audioElement = document.getElementById('audio');
const audioContext = new AudioContext();
const source = audioContext.createMediaElementSource(audioElement);
source.connect(audioContext.destination);

5. AudioContext.createGain(): This method allows you to create a GainNode, which can be used to adjust the volume of an audio signal.

Example:

const audioContext = new AudioContext();
const gainNode = audioContext.createGain();
gainNode.gain.value = 0.5; // set the gain to 50%
gainNode.connect(audioContext.destination);

6. AudioContext.createDelay(): This method allows you to create a DelayNode, which can be used to delay an audio signal.

Example:

const audioContext = new AudioContext();
const delayNode = audioContext.createDelay();
delayNode.delayTime.value = 1; // set the delay time to 1 second
delayNode.connect(audioContext.destination);

7. AudioContext.createBiquadFilter(): This method allows you to create a BiquadFilterNode, which can be used to apply various audio filters to an audio signal.

Example:

const audioContext = new AudioContext();
const filterNode = audioContext.createBiquadFilter();
filterNode.type = 'lowpass';
filterNode.frequency.value = 200; // set the cutoff frequency to 200 Hz
filterNode.connect(audioContext.destination);

These are just a few examples of the many new audio-related JavaScript features and APIs available.