react-visual-audio-recorder

ReactVisualAudioRecorder

A simple audio recorder compatible with a large part of the browsers.

ReactVisualAudioRecorder component

This component has been designed to render a sound wave when recording audio. The recording control functions are done via the ref of the component and the recording via the onData props for controlled and continuous recording or via the onChange props for data recording during breaks (pause/stop).

API Reference

ReactVisualAudioRecorder component props

None of the props are required

Parameter	Type	Default	Description
width	number	640	Width of the canvas.
height	number	100	Height of the canvas.
onStart	(MediaRecorder, AudioContext, MediaStream, AnalyserNode) => void		Called when the recording is started
onStop	(BlobObject) => void		Called when the recording is stopped.
onChange	(BlobObject) => void		Called when the recording is stopped or paused.
onData	(blob: Blob) => void;		Called during the recording. Sending all chunks as blob during the recording.
handleStatus	(status: "pause" "recording" "stopped") => void		Function that handle status of the recording instance.
audioBitsPerSecond	number	128000	Quality of the recording in bytes/second.
echoCancellation	boolean	true	Reduces the echo of the recording.
autoGainControl	boolean	true	Control circuit in an amplifier or a chain of amplifiers.
noiseSuppression	boolean	true	Suppresses background noise of the recording.
channelCount	number	2	Number of channels recorded. Default is left/right for a stereo recording.
frequencySize	number	512	Sine wave spacing.
mimeType	string	Depend of browser	https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types#audio_and_video_types
backgroundColor	string	rgba(255, 255, 255, 0.5)	BackgroundColor of the curve.
strokeColor	string	`#000000	Color of the curve.
className	string
ref	(ref: ForwardedRef<ReactVisualAudioRecorderRefHandler>) => void		Refs of the internal component functions. Setted with useImperativeHandle.

ReactVisualAudioRecorderRefHandler

function	Type	Description
start	() => void	Start recording.
stop	() => void	Stop recording.
reset	() => void	Reset recording.
pause	() => void	Pause recording.
resume	() => void	Resume recording.
getFileExtension	() => string	Return the correct extension for the mimeType,

Usage/Examples

import React, { useRef, useState } from "react";
import ReactVisualAudioRecorder from "react-visual-audio-recorder";
import type {
  ReactVisualAudioRecorderRefHandler,
  ReactVisualAudioRecorderBlobObject,
} from "react-visual-audio-recorder";

const visualizerWidth = 300;
const visualizerHeight = 70;

export default function App() {
  const [url, setUrl] = useState<string | null>(null);
  const [status, setStatus] = useState<"pause" | "recording" | "stopped">("stopped");

  const audioRecorder = useRef<ReactVisualAudioRecorderRefHandler | null>(null);

  function toggleRecording() {
    if (status === "stopped") audioRecorder.current?.start();
    else if (status === "pause") audioRecorder.current?.resume();
    else if (status === "recording") audioRecorder.current?.pause();
  }

  function onChange(blobObject: ReactVisualAudioRecorderBlobObject) {
    if (!blobObject) return;
    setUrl(blobObject.blobURL);
  }

  function reset() {
    audioRecorder.current?.reset();
    setUrl(null);
  }

  return (
    <div style={{ display: "flex", flexDirection: "column" }}>
      <div style={{ width: visualizerWidth, height: visualizerHeight }}>
        <ReactVisualAudioRecorder
          ref={audioRecorder}
          width={visualizerWidth}
          height={visualizerHeight}
          onChange={onChange}
          handleStatus={setStatus}
        />
      </div>
      <div>
        <button onClick={toggleRecording}>
          {status === "stopped" ? "Start recording" : status === "pause" ? "Resume" : "Pause"}
        </button>
        <button onClick={() => reset()} disabled={!url || status === "recording"}>
          Reset
        </button>
        {url ? (
          <a href={url} download={`file.${audioRecorder.current?.getFileExtension() || "ogg"}`}>
            <button>Download</button>
          </a>
        ) : null}
      </div>
      {url ? <audio src={url || ""} controls={true} /> : null}
    </div>
  );
}

License

MIT