Combining

src/circles.js

@@ -1,30 +1,93 @@
-const VOLUME_THRESHOLD = 20;
-const CIRCLE_RADIUS = 100;
-const CIRCLE_POINTS = 256;
-const FFT_SIZE = CIRCLE_POINTS;
-const MAX_CIRCLES = 20;
+import Worker from './sound.worker.js';
+import { getSpectrumData } from './util.js';
 
-export function setup(sketch, analyser) {
+export default class CirclesAnimation {
+  VOLUME_THRESHOLD = 20;
+  CIRCLE_RADIUS = 100;
+  CIRCLE_POINTS = 256;
+  FFT_SIZE = 256;
+  MAX_CIRCLES = 20;
+
+  baseHeight; 
+  baseWidth; 
+  maxVolume = 0;
+  maxPitch = 0;
+  minPitch = 0;
+  circles = [];
+
+  averageSpectrum;
+
+  constructor(audioCtx) {
+    this.worker = new Worker();
+    this.analyser = new AnalyserNode(audioCtx);
+    this.analyser.fftSize = this.FFT_SIZE;
+    this.audioProcessor = audioCtx.createScriptProcessor(this.FFT_SIZE * 2, 1, 1);
+    this.audioProcessor.onaudioprocess = () => this.audioProcess();
+    this.analyser.connect(this.audioProcessor);
+    this.worker.onmessage = e => this.getAverageData(e.data);
+  }
+
+  setup(sketch) {
     sketch.createCanvas(window.innerWidth, window.innerHeight);
     sketch.colorMode(sketch.HSL, 255);
-}
+    this.resize();
+  }
 
-export function draw(sketch) {
+  resize() {
+    this.baseWidth = window.innerWidth / 2;
+    this.baseHeight = window.innerHeight / 2;
+  }
+
+  getAverageData(data) {
+    this.averageSpectrum = data.averageSpectrum;
+  }
+
+  audioProcess() {
+    const spectrum = new Uint8Array(this.analyser.frequencyBinCount);
+    this.analyser.getByteFrequencyData(spectrum);
+    
+    spectrum.reverse();
+    
+    const data = getSpectrumData(spectrum);
+    this.worker.postMessage(data);
+    const { volume, pitch } = data;
+
+    if (volume > this.maxVolume) {
+      this.maxVolume = volume;
+    }
+
+    if (pitch > this.maxPitch) {
+      this.maxPitch = pitch;
+    }
+
+    if (pitch < this.minPitch) {
+      this.minPitch = pitch;
+    }
+
+    this.circles.unshift(data);
+
+    if (this.circles.length > this.MAX_CIRCLES) {
+      this.circles.pop();
+    }
+  }
+
+  draw(sketch) {
     sketch.background(30);
     sketch.noFill();
     sketch.strokeWeight(2);
     sketch.stroke(230);
 
-  for (let c = 0; c < circles.length; c++) {
-    const circle = circles[c];
+    for (let c = 0; c < this.circles.length; c++) {
+      const circle = this.circles[c];
       sketch.beginShape();
       for (let i = 0; i < circle.spectrum.length; i++) {
         const p = circle.spectrum[i];
         sketch.curveVertex(
-        Math.cos((i / CIRCLE_POINTS) * 2 * Math.PI) * (CIRCLE_RADIUS + c * 15) + baseWidth + (maxVolume / 2 - circle.volume) + p,
-        Math.sin((i / CIRCLE_POINTS) * 2 * Math.PI) * (CIRCLE_RADIUS + c * 15) + baseHeight + (maxPitch / 2 - circle.pitch) - p,
+          Math.cos((i / this.CIRCLE_POINTS) * 2 * Math.PI) * (this.CIRCLE_RADIUS + c * 15) + this.baseWidth + (this.maxVolume / 2 - circle.volume) + p,
+          Math.sin((i / this.CIRCLE_POINTS) * 2 * Math.PI) * (this.CIRCLE_RADIUS + c * 15) + this.baseHeight + (this.maxPitch / 2 - circle.pitch) - p,
         );
       }
       sketch.endShape(sketch.CLOSE);
     }
+  }
 }

src/horizontal-lines.js

@@ -42,8 +42,6 @@ export default class HorizontalLinesAnimation {
 
   getAverageData(data) {
     this.averageSpectrum = data.averageSpectrum;
-    console.log('got average');
-    console.log(this.averageSpectrum);
   }
 
   audioProcess() {

src/index.js

@@ -3,12 +3,25 @@ import './index.scss';
 
 import HorizontalLinesAnimation from './horizontal-lines.js';
 import SquaresAnimation from './squares.js';
+import CirclesAnimation from './circles.js';
 
 async function main() {
   const audioCtx = new AudioContext();
   const microphone = await navigator.mediaDevices.getUserMedia({ audio: true });
   const input = audioCtx.createMediaStreamSource(microphone);
 
+  const horizontalLines = new HorizontalLinesAnimation(audioCtx);
+  const squares = new SquaresAnimation(audioCtx);
+  const circles = new CirclesAnimation(audioCtx);
+
+  const animations = [
+    horizontalLines,
+    squares,
+    circles,
+  ];
+
+  let animationNum = 0;
+
   const instance = new p5(( sketch ) => {
     let activeAnimation;
 
@@ -19,16 +32,23 @@ async function main() {
 
     function activate(animation) {
       activeAnimation = animation;
+      input.disconnect();
       input.connect(animation.analyser);
       animation.setup(sketch);
     }
     
     sketch.setup = () => {
       sketch.createCanvas(window.innerWidth, window.innerHeight);
+      activate(animations[animationNum]);
 
-      const horizontalLines = new HorizontalLinesAnimation(audioCtx);
-      const squares = new SquaresAnimation(audioCtx);
-      activate(horizontalLines);
+      setInterval(() => {
+        animationNum++;
+        if (animationNum > animations.length - 1) {
+          animationNum = 0;
+        }
+
+        activate(animations[animationNum]);
+      }, 10000);
     };
 
     sketch.draw = () => {

src/sound.worker.js

@@ -1,9 +1,13 @@
-const PERIOD = 20 * 1000;
+const PERIOD = 1000;
+const CAPTURE_PERIOD = 60 * 1000;
 const data = [];
-let firstRun = true;
+
+let capture = true;
+
+setTimeout(() => capture = false, CAPTURE_PERIOD);
 
 function onDataPoint(event) {
-  if (!firstRun) {
+  if (!capture) {
     data.shift();
   }
   data.push(event.data);
@@ -12,8 +16,6 @@ function onDataPoint(event) {
 self.onmessage = onDataPoint;
 
 function calculateAndSend() {
-  firstRun = false;
-
   if (!data.length) {
     return;
   }