vitaliy-bobrov

<input
    class="gain-control"
    type="range"
    min="0"
    max="1"
    step="0.01"
    value="0.5">

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// Setting target value (1st argument) starting from
// the current time in 0.01 second period
gainNode.gain.setTargetAtTime(2, context.currentTime, 0.01);

// Doing the same but exponentially.
gainNode.gain.exponentialRampToValueAtTime(gain, context.currentTime + 0.01);

vitaliy-bobrov

// Create a gain node and set the initial value to 0.5
// that means that volume will be haft of the original.
const gainNode = new GainNode(context, {gain: 0.5});

// Disconnect source before constructing a new graph.
lineInSource.disconnect();

// Connect nodes
lineInSource.connect(gainNode).connect(context.destination);

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lineInSource.disconnect();

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const context = new AudioContext();

if (context.state === 'suspended') {
  await context.resume();
}

const stream = await navigator.mediaDevices
  .getUserMedia({
    audio: {
      echoCancellation: false,

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const lineInSource = context.createMediaStreamSource(stream);

lineInSource.connect(context.destination);

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// Getting permission status.
const micStatus = await navigator.permissions.query({name: 'microphone'});

console.log(micStatus); // state: "prompt"

// Reset permission to initial state.
await navigator.permissions.revoke({name: 'microphone'});

vitaliy-bobrov

const stream = await navigator.mediaDevices
  .getUserMedia({
    audio: {
      echoCancellation: false,
      autoGainControl: false,
      noiseSuppression: false,
      latency: 0
    }
  });

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const stream = await navigator.mediaDevices
  .getUserMedia({audio: true});

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if (context.state === 'suspended') {
  await context.resume();
}