vue-audio-visual

Vue HTML5 audio visualization components

• Overview
• Get started
  • Install
  • Use plugin
  • Use component
  • Composable functions
• API details
  • Common props
  • Common events
  • AvLine props
  • AvBars props
  • AvCircle props
  • AvWaveform props
  • AvMedia props
• Issues
• License

UPDATE NOTES

Warning

Plugin current version is compatibale only with Vue v3. For Vue2 use plugin version 2.5.1. See install chapter for details.

Overview

An audio spectrum visualizer plugin for VueJS framework. It is built with HTML5 Web Audio API and compatible with all browsers that support HTML5 audio API. It provides several Vue components that allows to draw light and nice visualization for "audio" HTML elements.

Note

Visit DEMO page for working examples.

Usage examples:

Component AvLine. Vue template name <av-line>

<av-line :line-width="2" line-color="lime" src="/static/music.mp3"></av-line>

This will create following element:

Component AvBars. Vue template name <av-bars>

<av-bars
  caps-color="#FFF"
  :bar-color="['#f00', '#ff0', '#0f0']"
  canv-fill-color="#000"
  :caps-height="2"
  src="/static/bach.mp3"
></av-bars>

This will create following element:

Component AvCircle. Vue template name <av-circle>

<av-circle
  :outline-width="0"
  :progress-width="5"
  :outline-meter-space="5"
  :playtime="true"
  playtime-font="18px Monaco"
  src="/static/bach.mp3"
></av-circle>

This will create following element:

Component AvWaveform. Vue template name <av-waveform>

<av-waveform src="/static/bar.mp3"></av-waveform>

This will create following waveform element:

Component will pre-load audio content and generate clickable waveform.

Component AvMedia. Vue component <AvMedia>

<AvMedia :media="mediaObject" type="vbar"></AvMedia>

This will create following media element:

There are more media types. See details below.

⚙️ Get started

Install

Install using npm

npm install --save vue-audio-visual

for Vue 2 install version 2.5.1

npm i -S vue-audio-visual@2.5.1

Use plugin

Install plugin in main.js:

import { createApp } from "vue";
import App from "./App.vue";
import { AVPlugin } from "vue-audio-visual";

const app = createApp(App);
app.use(AVPlugin);

app.mount("#app");

Then anywhere is your app you can use it like this:

<av-bars src="/static/bach.mp3" bar-color="#CCC"> </av-bars>

Use component

Single component can be imported and used

<script setup lang="ts">
import { AVWaveform } from 'vue-audio-visual'
</script>

<template>
  <AVWaveform src="http://foo.com/music.ogg" />
</template>

Composable functions

Plugin provides composable "use" functions for each plugin component. Actually, each component uses composable function inside. See, for example, line component.

Composable functions use audio and canvas element refs. It is handy when you need full access to audio or canvas elements. In the same time it is easy to use:

<script setup lang="ts">
import { ref } from 'vue'
import { useAVBars } from 'vue-audio-visual'

const player = ref(null)
const canvas = ref(null)
const mySource = "./symphony.mp3"

// composable function useAVBars
useAVBars(player, canvas, { src: mySource, canvHeight: 40, canvWidth: 200, barColor: 'lime' })
</script>

<template>
  <div>
    <audio ref="player" :src="mySource" controls />
    <canvas ref="canvas" />
  </div>
</template>

⚙️ API

There are several components that comes with plugin. Here is the list of available plugins:

Name	Component name	Composable function
av-bars	AVBars	useAVBars
av-circle	AvCircle	useAVCircle
av-line	AVLine	useAVLine
av-media	AVMedia	useAVMedia
av-waveform	AVWaveform	useAVWaveform

There are props that are common for all components and special props for each component. All props for components' names follow vue specs when using wiht composable functions. Meaning when prop's name is "foo-bar" then in composable function parameter it is expected to be "fooBar".

Common props

Name	Type	Default	Description
src	String	null	URL of Audio element src attribute. When provided creates audio element wrapped in "div".
audio-controls	Boolean	true	Audio element controls attribute. When provided should display audio element with controls.
canv-fill-color	String	null	Canvas fill background RGB color. Default is null, which makes background transperent. Examples: canv-fill-color="#00AAFF"

AVLine props

Name	Type	Default	Description
canv-width	Number	300	Canvas element width. Default 300. Example: :canv-width="600"
canv-height	Number	80	Canvas element height. Default 80. Example: :canv-height="120"
line-width	Number	2	Graph line width in px. Integer or float number. Example: :line-width="0.5"
line-color	String, Array	#9F9	Graph line color. Can be string RGB color or Array of RGB color. When Array is given, plugin creates linear gradient and set it as background. Array value should be binded. Examples: line-color="#00AAFF" :line-color="['#FFF', 'rgb(0,255,127)', '#00f']"
fft-size	Number	128	Represents the window size in samples that is used when performing a Fast Fourier Transform (FFT) to get frequency domain data. Must be power of 2 between 25 and 215. Example: :fft-size="512"

Composable function:

function useAVLine<T extends object>(
  player: Ref<HTMLAudioElement | null>,
  canvas: Ref<HTMLCanvasElement | null>,
  props: T,
);

AVBars props

Name	Type	Default	Description
canv-width	Number	300	Canvas element width. Default 300. Example: :canv-width="600"
canv-height	Number	80	Canvas element height. Default 80. Example: :canv-height="120"
bar-width	Number	5	Width of bars in pixels. Example: :bar-width="12"
bar-space	Number	1	Space between bars. Example: :bar-space="1.6"
bar-color	String, Array	#0A0AFF	Bar fill color. Can be string RGB color or canvas gradients array. Examples: bar-color="#00AAFF" :bar-color="['#FFF', 'rgb(0,255,127)', 'green']"
caps-height	Number	0	Create caps on bars with given height in pixels. When zero no caps created. Example: :caps-height="2"
caps-drop-speed	Number	0.9	Caps drop down animation speed. The higher nubmer the faster caps are going down. Example: :caps-drop-speed="0.5"
caps-color	String	#A0A0FF	Caps rectangles RGB color. Example: caps-color="lime"
brick-height	Number	0	Draw bar as bricks when height is set and not zero. Example: :brick-height="6"
brick-space	Number	1	Space between bricks. Example: :brick-space="2"
symmetric	Boolean	false	Draw bars symmetric to canvas vertical center. Example: :symmetric="true"
fft-size	Number	1024	Represents the window size in samples that is used when performing a Fast Fourier Transform (FFT) to get frequency domain data. Must be power of 2 between 25 and 215. Example: :fft-size="2048"

Composable function

function useAVBars<T extends object>(
  player: Ref<HTMLAudioElement | null>,
  canvas: Ref<HTMLCanvasElement | null>,
  props: T,
);

AVCircle props

Name	Type	Default	Description
canv-width	Number	100	Canvas element width. Example: :canv-width="600"
canv-height	Number	100	Canvas element height. Example: :canv-height="120"
radius	Number	0	Base circle radius. If zero, then will be calculated from canvas width: (canv-width / 2) * 0.7 Example: :radius="20"
line-width	Number	1	Frequency bit line width to draw. Example: :line-width="0.4"
line-space	Number	1	Space between lines to draw. Example: :line-space="2"
outline-color	String	#0000FF	Outline (contour) style RGB color. Example: outline-color="rgb(0,255,0)"
outline-width	Number	0.3	Outline (contour) line width. Float value. Example: :outline-width="1"
bar-width	Number	1	Frequency graph bar width. Example: :bar-width="1"
bar-length	Number	0	Frequency graph bar length/height. Default is a difference between radius and canvas width. Example: :bar-length="27"
bar-color	String, Array	[#FFF,#00F]	Bar style RGB color or radient gradient when array. Example: :bar-color="#12AA55"
progress	Boolean	true	Draw playtime progress meter. Example: :progress="false"
progress-width	Number	1	Playtime progress meter width. Example: :progress-width="2.4"
progress-color	String	#0000FF	Playtime progress meter color. Example: :progress-color="green"
progress-clockwise	Boolean	false	Playtime progress meter arc draw direction. Example: :progress-clockwise="true"
outline-meter-space	Number	3	Space between outline and progress meter. The bigger the closer to the circle centre. Example: :outline-meter-space="1"
playtime	Boolean	false	Draw played time as text in the center of the circle. Example: :playtime="true"
playtime-font	String	14px Monaco	Played time print font. Example: playtime-font="18px monospace"
playtime-color	String	#00f	Played time font color. Example: playtime-color="green"
rotate-graph	Boolean	false	Rotate graph clockwise enable. Example: :rotate-graph="true"
rotate-speed	Number	0.001	Rotate graph speed. Example: :rotate-speed="0.2"
fft-size	Number	1024	Represents the window size in samples that is used when performing a Fast Fourier Transform (FFT) to get frequency domain data. Must be power of 2 between 25 and 215. Example: :fft-size="2048"

Composable function

function useAVCircle<T extends object>(
  player: Ref<HTMLAudioElement | null>,
  canvas: Ref<HTMLCanvasElement | null>,
  props: T,
);

AVWaveform props

Name	Type	Default	Description
canv-width	Number	500	Canvas element width. Example: :canv-width="600"
canv-height	Number	80	Canvas element height. Example: :canv-height="120"
played-line-width	Number	0.5	Waveform line width for played segment of audio. Example: :playtime-line-width="0.8"
played-line-color	String	navy	Waveform line color for played segment of audio. Example: :playtime-line-color="#ABC123"
noplayed-line-width	Number	0.5	Waveform line width for not yet played segment of audio Example: :noplayed-line-width="1"
noplayed-line-color	String	lime	Waveform line color for not yet played segment of audio. Example: :noplayed-line-color="grey"
playtime	Boolean	true	Display played time next to progress slider. Example: :playtime="false"
playtime-with-ms	Boolean	true	Display milliseconds in played when true. For example: 02:55.054. Example: :playtime-with-ms="false"
playtime-font-size	Number	12	Played time print font size in pixels. Example: :playtime-font-size="14"
playtime-font-family	String	monospace	Played time print font family. Example: :playtime-font-family="monaco"
playtime-font-color	String	grey	Played time print font RGB color string. Example: :playtime-font-color="#00f"
playtime-text-bottom	Boolean	false	Position playtime text bottom. Default on top. Example: playtime-text-bottom
playtime-slider	Boolean	true	Draw played time slider on the waveform. Example: :playtime-slider="false"
playtime-slider-color	String	red	Played slider color. Example: :playtime-slider-color="#fafafa"
playtime-slider-width	Number	1	Played slider width. Example: :playtime-slider-width="2.5"
playtime-clickable	Boolean	true	Allow click on waveform to change playtime. Example: :playtime-clickable="false"

Composable function is using useFetch from @vueuse/core package. useAVWaveform last argument is options for "createFetch" function from "useFetch" module.

export function useAVWaveform<T extends object>(
  player: Ref<HTMLAudioElement | null>,
  canvas: Ref<HTMLCanvasElement | null>,
  props: T,
  fetchOpts: CreateFetchOptions = {},
);

AVMedia props

Component expects MediaStream object. You can get it directly from navigator.mediaDevices or from @vueuse/core library function useUserMedia. Live example can be found in App.vue.

<script setup lang="ts">
import { AVMedia } from 'vue-audio-visual'
import { useUserMedia } from '@vueuse/core'
...
const { stream } = useUserMedia()
...
</script>

<template>
...
<AVMedia :media="stream" type="circle" />
...
</template>

Name	Type	Default	Description
media	MediaStream	none	Required property. See example above.
type	String	wform	Type of media visualization. Available types: 'wform', 'circle', 'frequ' and 'vbar'. If not set or not recognized then 'wform' is set. See examples in demo. Example: type="frequ"
canv-width	Number	null	Canvas element width. Default value depends on plugin type: circle: 80 frequ: 300 vbar: 50 wform: 200 Example: :canv-width="600"
canv-height	Number	null	Canvas element height. Default value depends on plugin type: circle: 80 frequ: 80 vbar: 20 wform: 40 Example: :canv-height="120"
canv-class	String	null	Canvas element css class name.
fft-size	Number	1024/8192	Represents the window size in samples that is used when performing a Fast Fourier Transform (FFT) to get frequency domain data. Default 8192 for the type 'wform' or 1024 for 'frequ' Example: :fft-size="512"
frequ-lnum	Number	60	Number of vertical lines for 'frequ' type. Example: :frequ-lnum="30"
frequ-line-cap	Boolean	false	Draw lines of 'frequ' type with rounded caps. Example: :frequ-line-cap="true"
frequ-direction	String	lr	Direction to draw the frequency. Available values: 'lr' or 'mo' (left to right or middle out). If not set or not recognized then 'lr' is set. Example: frequ-direction="mo"
line-color	String	#9F9	Graph line RGB color. Examples: line-color="#00AAFF"
line-width	Number	0.5 / 3	Graph line width in px. Integer or float number. If not set then 0.5 for 'wform' type and 3 for 'frequ' Example: :line-width="0.8"
radius	Number	0	Base 'circle' radius. Example: :radius="4"
connect-destination	Boolean	false	Analyser to connect to audio context's destination. Avoid echo during playback. Example: :connect-destination="true"
vbar-bg-color	String	#e1e1e1	Background canvas color for 'vbar' type
vbar-caps	Boolean	true	Rounded bars for 'vbar' types
vbar-space	Number	1	Space between bars in 'vbar' type
vbar-width	Number	4	Width of bars in 'vbar' type
vbar-fill-color	String	lime	Color of bars in 'vbar' type
vbar-right-color	String	#c0c0c0	Color of bars on right side in 'vbar' type

Composable function:

function useAVMedia<T extends object>(
  canvas: Ref<HTMLCanvasElement | null>,
  props: T,
);

License

MIT Copyright (c) 2018-present, Stas Kobzar