Solves issue #78 where effects - other than the first one - in groups could not be removed.

Author: alemangui

distr/Pizzicato.js

@@ -1013,7 +1013,7 @@
 					return this;
 				}
 
-				var previousNode = (index === 0) ? this.mergeGainNode : this.effectConnectors(index - 1);
+				var previousNode = (index === 0) ? this.mergeGainNode : this.effectConnectors[index - 1];
 				previousNode.disconnect();
 
 				// Disconnect connector and effect

distr/Pizzicato.min.js

@@ -1013,7 +1013,7 @@
 					return this;
 				}
 
-				var previousNode = (index === 0) ? this.mergeGainNode : this.effectConnectors(index - 1);
+				var previousNode = (index === 0) ? this.mergeGainNode : this.effectConnectors[index - 1];
 				previousNode.disconnect();
 
 				// Disconnect connector and effect

site/Pizzicato.js

@@ -186,7 +186,7 @@ Pizzicato.Group.prototype = Object.create(Pz.Events, {
 				return this;
 			}
 
-			var previousNode = (index === 0) ? this.mergeGainNode : this.effectConnectors(index - 1);
+			var previousNode = (index === 0) ? this.mergeGainNode : this.effectConnectors[index - 1];
 			previousNode.disconnect();
 
 			// Disconnect connector and effect

src/Group.js

@@ -90,11 +90,19 @@ describe('Group', function() {
 
 		it('can be added and removed', function() {
 			var delay = new Pizzicato.Effects.Delay();
+			var pingPongDelay = new Pizzicato.Effects.PingPongDelay();
 			var group = new Pizzicato.Group();
 
 			group.addEffect(delay);
 			expect(group.effects.indexOf(delay)).not.toBe(-1);
 
+			group.addEffect(pingPongDelay);
+			expect(group.effects.indexOf(pingPongDelay)).not.toBe(-1);
+
+			group.removeEffect(pingPongDelay);
+			expect(group.effects.indexOf(pingPongDelay)).toBe(-1);
+			expect(group.effects.indexOf(delay)).not.toBe(-1);
+
 			group.removeEffect(delay);
 			expect(group.effects.indexOf(delay)).toBe(-1);
 		});