From 550712d2e03104c6fb12f8a402d8305270dd7da8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20B=C3=A4dorf?= <hello@benjaminbaedorf.eu>
Date: Sat, 8 Jun 2019 16:29:22 +0200
Subject: [PATCH] Pitch bars colors

---
 src/index.js | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/index.js b/src/index.js
index 9223541..635212f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -43,6 +43,8 @@ async function main() {
   let fresh = false;
   let spectrum = [];
   let pitch = 0;
+  let minPitch = 90;
+  let maxPitch = 90;
   let volume = 0;
   let volumeThreshold = 0;
   let bars = [];
@@ -62,9 +64,16 @@ async function main() {
 
     const currentVolume = getRMS(spectrum);
     // get peak - a hack when our volumes are low
-    if (currentVolume > volumeThreshold) volumeThreshold = currentVolume;
+    if (currentVolume > volumeThreshold) {
+      volumeThreshold = currentVolume;
+    }
     volume = currentVolume;
     pitch = getPitch(spectrum, volume, volumeThreshold);
+    if (pitch > maxPitch) {
+      maxPitch = pitch
+    } else if (pitch < minPitch) {
+      minPitch = pitch;
+    }
   }
 
   const input = audioCtx.createMediaStreamSource(microphone);
@@ -97,7 +106,8 @@ async function main() {
 
       const newBars = [];
       for (const bar of bars) {
-        sketch.fill(sketch.color(0, 0, (bar.volume / volumeThreshold) * 255));
+        const normalizedPitchColor = ((bar.pitch - minPitch) / (maxPitch - minPitch)) * 220;
+        sketch.fill(sketch.color(normalizedPitchColor, bar.volume, (bar.volume / volumeThreshold) * 255));
         sketch.rect(bar.x, 0, bar.age * bar.volume * 2, window.innerHeight);
         bar.age /= 2;
         if (bar.age > 0.1) {
@@ -108,6 +118,10 @@ async function main() {
       bars = newBars;
     };
   });
+
+  setTimeout(() => {
+   // analyser.disconnect();
+  }, 5000);
 }
 
 main();