This is a webaudio event scheduler inspired by the article: https://html5rocks.com/en/tutorials/audio/scheduling/. 

This is a webaudio event scheduler inspired by the article: https://html5rocks.com/en/tutorials/audio/scheduling/

errozero

@errozero/beatstepper

This is a webaudio event scheduler inspired by the article: https://html5rocks.com/en/tutorials/audio/scheduling/

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		//Based on article: https://html5rocks.com/en/tutorials/audio/scheduling/

		//Web Worker as a string, removes the need to provide a url to a worker file, this dynamically creates one
		//https://stackoverflow.com/a/61621269/2347456
		import tempoWorker from './worker';

		const workerCode = `
		let speed = 100;
		let timerID = null;
		onmessage = (e) => {
		//console.log('MESSAGE', e.data);

		if(e.data.speed) speed = e.data.speed;

		if(e.data.message === 'start'){
		timerID = setInterval(() => {postMessage('pulse')}, speed);
		}
		else if(e.data.message === 'stop'){
		clearInterval(timerID);
		timerID=null;
		}
		}
		`;

		const workerBlob = new Blob([workerCode], {type: 'application/javascript'})

		interface IBeatstepperCallbackData {
		@@ -40,5 +19,5 @@ step: number,
		private tempoWorker: Worker;
		private scheduleAheadTime = 0.18; //How far ahead to schedule events (in seconds)
		private lookAhead = 20.0; //How frequently to call scheduling (in ms)
		private nextStepTime = 0;
		private scheduleAheadTime = 0.18; //How far ahead to schedule events (in seconds)
		private lookAhead = 20.0; //How frequently to call scheduling (in ms)
		private nextStepTime = 0;
		private currentStep = 0;
		@@ -59,3 +38,3 @@ private currentBeat = 0;

		this.tempoWorker = new Worker(URL.createObjectURL(workerBlob));
		this.tempoWorker = tempoWorker;
		this.tempoWorker.postMessage({speed: this.lookAhead});
		@@ -62,0 +41,0 @@ this.tempoWorker.onmessage = () => {this.scheduler()};

		@@ -7,3 +7,3 @@ {
		},
		"version": "1.0.3",
		"version": "1.0.4",
		"description": "",
		@@ -19,6 +19,6 @@ "main": "dist/Beatstepper.js",
		"keywords": [
		"webaudio",
		"scheduler",
		"web audio"
		"webaudio",
		"scheduler",
		"web audio"
		]
		}

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