react-audio-visualize

An audio visualizer for React. Provides separate components to visualize both live audio and audio blobs.

Installation

npm install react-audio-visualize

AudioVisualizer Component (Example)

import React, { useState, useRef } from 'react';
import { AudioVisualizer } from 'react-audio-visualize';

const Visualizer = () => {
  const [blob, setBlob] = useState<Blob>();
  const visualizerRef = useRef<HTMLCanvasElement>(null)

  // set blob somewhere in code

  return (
    <div>
      {blob && (
        <AudioVisualizer
          ref={visualizerRef}
          blob={blob}
          width={500}
          height={75}
          barWidth={1}
          gap={0}
          barColor={'#f76565'}
        />
      )}
    </div>
  )
}

| Props | Description | Default | Optional | | :------------ |:--------------- |:--------------- | :--------------- | | blob | Audio blob to visualize | N/A | No | | width | Width of the visualizer | N/A | No | | height | Height of the visualizer | N/A | No | | barWidth | Width of each individual bar in the visualization | 2 | Yes | | gap | Gap between each bar in the visualization | 1 | Yes | | backgroundColor | BackgroundColor for the visualization | transparent | Yes | | barColor | Color for the bars that have not yet been played | "rgb(184, 184, 184)"" | Yes | | barPlayedColor | Color for the bars that have been played | "rgb(160, 198, 255)"" | Yes | | currentTime | Current time stamp till which the audio blob has been played. Visualized bars that fall before the current time will have barPlayerColor, while that ones that fall after will have barColor | N/A | Yes | | style | Custom styles that can be passed to the visualization canvas | N/A | Yes | | ref | A ForwardedRef for the HTMLCanvasElement | N/A | Yes |

LiveAudioVisualizer Component (Example)

import React, { useState } from 'react';
import { LiveAudioVisualizer } from 'react-audio-visualize';

const Visualizer = () => {
  const [mediaRecorder, setMediaRecorder] = useState<MediaRecorder>();

  // set media recorder somewhere in code

  return (
    <div>
      {mediaRecorder && (
        <LiveAudioVisualizer
          mediaRecorder={mediaRecorder}
          width={200}
          height={75}
        />
      )}
    </div>
  )
}

| Props | Description | Default | Optional | | :------------ |:--------------- |:--------------- | :--------------- | | mediaRecorder | Media recorder who's stream needs to visualized | N/A | No | | width | Width of the visualizer | 100% | Yes | | height | Height of the visualizer | 100% | Yes | | barWidth | Width of each individual bar in the visualization | 2 | Yes | | gap | Gap between each bar in the visualization | 1 | Yes | | backgroundColor | BackgroundColor for the visualization | transparent | Yes | | barColor | Color for the bars that have not yet been played | "rgb(160, 198, 255)" | Yes | | fftSize | An unsigned integer, representing the window size of the FFT, given in number of samples. For more details | 1024 | Yes | | maxDecibels | A double, representing the maximum decibel value for scaling the FFT analysis data. For more details | -10 | Yes | | minDecibels | A double, representing the minimum decibel value for scaling the FFT analysis data, where 0 dB is the loudest possible sound. For more details | -90 | Yes | | smoothingTimeConstant | A double within the range 0 to 1 (0 meaning no time averaging). For more details | 0.4 | Yes |