README.md

react-audio-voice-recorder

An audio recording helper for React. Provides a component and a hook to help with audio recording.

Installation

npm install react-audio-voice-recorder

yarn add react-audio-voice-recorder

Migrating from v1 → v2

Breaking changes

• In v2 the AudioRecorder prop downloadFileExtension no longer supports mp3 and wav without the website using this package being cross-origin isolated. This change was made in order to fix issue #54 in v1.2.1

Usage

AudioRecorder Component (See it in action)

You can use an out-of-the-box component that takes onRecordingComplete method as a prop and calls it when you save the recording

import React from "react";
import ReactDOM from "react-dom/client";
import { AudioRecorder } from 'react-audio-voice-recorder';

const addAudioElement = (blob) => {
  const url = URL.createObjectURL(blob);
  const audio = document.createElement("audio");
  audio.src = url;
  audio.controls = true;
  document.body.appendChild(audio);
};

ReactDOM.createRoot(document.getElementById("root")).render(
  <React.StrictMode>
    <AudioRecorder 
      onRecordingComplete={addAudioElement}
      audioTrackConstraints={{
        noiseSuppression: true,
        echoCancellation: true,
      }} 
      downloadOnSavePress={true}
      downloadFileExtension="webm"
    />
  </React.StrictMode>
);

Props	Description	Default	Optional
onRecordingComplete	A method that gets called when "Save recording" option is pressed	N/A	Yes
audioTrackConstraints	Takes a subset of MediaTrackConstraints that apply to the audio track	N/A	Yes
onNotAllowedOrFound	This gets called when the getUserMedia promise is rejected. It takes the resultant DOMException as its parameter	N/A	Yes
downloadOnSavePress	A boolean value that determines if the recording should be downloaded when "Save recording" option is pressed	false	Yes
downloadFileExtension	The file extension to be used for the downloaded file. Allowed values are webm, mp3 and wav. In order to use mp3 or wav please ensure that your website is cross-origin isolated. Further reading	webm	Yes
showVisualizer	Displays a waveform visualization for the audio when set to true	false	Yes
classes	This allows class names to be passed to modify the styles for the entire component or specific portions of it	N/A	Yes

NOTE: In order for mp3 and wav downloading to work properly, your website needs to be cross-origin isolated. This is necessary because this package uses FFmpeg which internally uses SharedArrayBuffer that requires cross-origin isolation

---

useAudioRecorder hook

If you prefer to build up your own UI but take advantage of the implementation provided by this package, you can use this hook instead of the component

Params	Description	Optional
audioTrackConstraints	Takes a subset of MediaTrackConstraints that apply to the audio track	Yes
onNotAllowedOrFound	This gets called when the getUserMedia promise is rejected. It takes the resultant DOMException as its parameter	Yes

The hook returns the following:

Identifiers	Description
startRecording	Invoking this method starts the recording. Sets isRecording to true
stopRecording	Invoking this method stops the recording in progress and the resulting audio is made available in recordingBlob. Sets isRecording to false
togglePauseResume	Invoking this method would pause the recording if it is currently running or resume if it is paused. Toggles the value isPaused
recordingBlob	This is the recording blob that is created after stopRecording has been called
isRecording	A boolean value that represents whether a recording is currently in progress
isPaused	A boolean value that represents whether a recording in progress is paused
recordingTime	Number of seconds that the recording has gone on. This is updated every second
mediaRecorder	The current mediaRecorder in use. Can be undefined in case recording is not in progress

Sample usage of hook

  import { useAudioRecorder } from 'react-audio-voice-recorder';
  // ...
  // ...
  const {
    startRecording,
    stopRecording,
    togglePauseResume,
    recordingBlob,
    isRecording,
    isPaused,
    recordingTime,
    mediaRecorder
  } = useAudioRecorder();

  useEffect(() => {
    if (!recordingBlob) return;

    // recordingBlob will be present at this point after 'stopRecording' has been called
  }, [recordingBlob])

---

Combine the useAudioRecorder hook and the AudioRecorder component

This is for scenarios where you would wish to control the AudioRecorder component from outside the component. You can call the useAudioRecorder and pass the object it returns to the recorderControls of the AudioRecorder. This would enable you to control the AudioRecorder component from outside the component as well

Sample usage (See it in action)

import { AudioRecorder, useAudioRecorder } from 'react-audio-voice-recorder';

const ExampleComponent = () => {
  const recorderControls = useAudioRecorder()
  const addAudioElement = (blob) => {
    const url = URL.createObjectURL(blob);
    const audio = document.createElement("audio");
    audio.src = url;
    audio.controls = true;
    document.body.appendChild(audio);
  };

  return (
    <div>
      <AudioRecorder 
        onRecordingComplete={(blob) => addAudioElement(blob)}
        recorderControls={recorderControls}
      />
      <button onClick={recorderControls.stopRecording}>Stop recording</button>
    </div>
  )
}

NOTE: When using both AudioRecorder and useAudioRecorder in combination, the audioTrackConstraints and onNotAllowedOrFound should be provided in the useAudioRecorder hook