                         spriteNode.runAction(changeColorAction) {
                             spriteNode.color = self.minimalPurple
                         }
-                        synth.mute(true)
                     }
+                    updateSynthNote()
                 }
             }
         }

                            spriteNode.color = self.minimalLightPurple
                        }
                    }
                }
            }
        }
    }


    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
            // when user touches a button, turn it light blue

        for touch in touches {
            let location = touch.locationInNode(self)

            let nodes = nodesAtPoint(location) as [SKNode]

            for node in nodes {
                if let name = node.name {
                    if name.containsString("noteButton") {
                        // if it's a noteButton....

                        handleNoteStart(name)
                        let spriteNode = node as! SKSpriteNode

                        let changeColorAction = SKAction.colorizeWithColor(minimalLightBlue, colorBlendFactor: 1.0, duration: 0)
