audiowaveforms

Visualize audio (AudioBuffer) as a hortizontal waveform using SVG elements. It displays the waveform (amplitude) , progress and remaining during audio playback.

Install

npm install audiowaveforms

How to

Below is a brief description of how to use 'audiowaveforms'. As the things evolves i'll make sure that a proper documentations is available.

Markup

Below is the SVGElement that represents (hold) the audiowavforms, embed this in your application.

<svg id="audio-waves" preserveAspectRatio="none" width="2000" height="100" style="width:100%;height:100px;" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<linearGradient id="Gradient" x1="0" x2="0" y1="0" y2="1">
  <stop offset="0%" stop-color="white" />
  <stop offset="90%" stop-color="white" stop-opacity="0.75" />
  <stop offset="100%" stop-color="white" stop-opacity="0" />
</linearGradient>
<mask id="Mask">
  <path fill="url(#Gradient)" />
</mask>
<rect class="aw-progress" mask="url(#Mask)" x="0" y="0" width="0" height="100" fill="rgb(255, 106, 106)" />
<rect class="aw-remaining" mask="url(#Mask)" x="0" y="0" width="0" height="100" fill="rgb(170, 56, 56)" />
 </svg>

Create an instance

const audioEl = document.querySelector("your Audio element selector");
const svg = document.querySelector("#audio-waves"); // as above
const aw = new AudioWaveform(audioBuffer,audioEl, svg);

Update the waveform

Update the progress and remaining indicators.

//  where 'aw' is the instance of yours

   window.setInterval( () => {
                    this.audiowaveform.updateAudioPosition();
    },1000 / 60);

Other

See /examples folder or try this example app https://magnusthor.github.io/audiowaveforms/example/example.html