x-oscilloscope
v2.0.1
Published
Audio oscilloscope visualizer Web Component
Downloads
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Maintainers
Readme
Audio oscilloscope visualizer Web Component
Examples
import { fetchAudioBuffer } from 'webaudio-tools'
import { OscilloscopeElement } from 'x-oscilloscope'
customElements.define('x-oscilloscope', OscilloscopeElement)
document.body.innerHTML = `
<div id="demo" style="display:inline-flex;height:80px;">
<x-oscilloscope autoresize divider=4></x-oscilloscope>
</div>
`
const ctx = new AudioContext({ sampleRate: 44100, latencyHint: 0.08 })
const analyser = ctx.createAnalyser()
analyser.fftSize = 8192
analyser.smoothingTimeConstant = 0
analyser.maxDecibels = 0
analyser.minDecibels = -100
// @ts-ignore
const url = new URL('alpha_molecule.ogg', import.meta.url).toString()
fetchAudioBuffer(ctx, url).then(audioBuffer => {
const source = ctx.createBufferSource()
source.buffer = audioBuffer
source.loop = true
source.connect(ctx.destination)
source.start(0, 83)
source.connect(analyser)
;(document.querySelector('x-oscilloscope') as OscilloscopeElement).analyser =
analyser
})
window.onclick = () => ctx.state !== 'running' ? ctx.resume() : ctx.suspend()
if (ctx.state !== 'running')
document.body.appendChild(new Text('click to start/stop'))
// requestAnimationFrame <- for shoty
API
Credits
- sigl by stagas – Web framework
- x-plot by stagas – A Web Component that plots zoomable and pannable waveforms.
Contributing
All contributions are welcome!
License
MIT © 2022 stagas