Added AudioAnalyser.

examples/misc_sound.html

@@ -61,6 +61,8 @@
 			var mesh;
 			var material_sphere1, material_sphere2;
 
+			var analyser1, analyser2, analyser3;
+
 			var clock = new THREE.Clock();
 
 			init();
@@ -114,6 +116,8 @@
 				sound2.autoplay = true;
 				mesh2.add( sound2 );
 
+				//
+
 
 				var mesh3 = new THREE.Mesh( sphere, material_sphere3 );
 				mesh3.position.set( 0, 30, -250 );
@@ -129,6 +133,12 @@
 				sound3.setVolume(0.5);
 				mesh3.add(sound3);
 
+				// analysers
+
+				analyser1 = new THREE.AudioAnalyser( sound1, 32 );
+				analyser2 = new THREE.AudioAnalyser( sound2, 32 );
+				analyser3 = new THREE.AudioAnalyser( sound3, 32 );
+
 				// global ambient audio
 
 				var sound4 = new THREE.Audio( listener );
@@ -237,9 +247,9 @@
 
 				controls.update( delta );
 
-				material_sphere1.color.setHSL( 0.0, 0.3 + 0.7 * ( 1 + Math.cos( time ) ) / 2, 0.5 );
-				material_sphere2.color.setHSL( 0.1, 0.3 + 0.7 * ( 1 + Math.sin( time ) ) / 2, 0.5 );
-				material_sphere3.color.setHSL( 0.1, 0.5, 0.3 + 0.7 * ( 1 + Math.sin( time ) ) / 2);
+				material_sphere1.emissive.b = ( analyser1.getData()[ 8 ] / 256 );
+				material_sphere2.emissive.b = ( analyser2.getData()[ 8 ] / 256 );
+				material_sphere3.emissive.b = ( analyser3.getData()[ 8 ] / 256 );
 
 				renderer.render( scene, camera );
 

src/audio/AudioAnalyser.js

@@ -0,0 +1,27 @@
+/**
+ * @author mrdoob / http://mrdoob.com/
+ */
+
+THREE.AudioAnalyser = function ( audio, fftSize ) {
+
+	this.analyser = audio.context.createAnalyser();
+	this.analyser.fftSize = fftSize !== undefined ? fftSize : 2048;
+
+	this.data = new Uint8Array( this.analyser.frequencyBinCount );
+
+	audio.getOutput().connect( this.analyser );
+
+};
+
+THREE.AudioAnalyser.prototype = {
+
+	constructor: THREE.AudioAnalyser,
+
+	getData: function () {
+
+		this.analyser.getByteFrequencyData( this.data );
+		return this.data;
+
+	}
+
+};

utils/build/includes/common.json

@@ -53,6 +53,7 @@
 	"src/animation/tracks/StringKeyframeTrack.js",
 	"src/animation/tracks/VectorKeyframeTrack.js",
 	"src/audio/Audio.js",
+	"src/audio/AudioAnalyser.js",	
 	"src/audio/AudioBuffer.js",	
 	"src/audio/PositionalAudio.js",
 	"src/audio/AudioListener.js",