   var longShotPlayers: Array<AVAudioPlayerNode> = []
   var oneShotPlayers: Array<AVAudioPlayerNode> = []
   var audioFiles: Array<AVAudioFile> = []
+  var current_index: Int = 0
   let reverbPresetsStrings: Array<String> = [
     "SmallRoom",
     "MediumRoom",

      NSLog("Error")
    }
    
    prevDeg = current_deg
  }
  
  func radiansToDegrees(value: Double) -> Double {

      else {
        setTonePlayerType(PlayerType.OneShot)
        
        for i in 1..<itemsCount+1 {
          let num = NSString(format: "%02d", isLeft ? itemsCount+1 - i : i) // 左車輪の音だったら反転し、２桁で0埋め
          let url = NSBundle.mainBundle().pathForResource("tones/\(toneDir)/\(num)", ofType: "wav")!
          let audioFile = AVAudioFile(forReading: NSURL(fileURLWithPath: url), error: nil)
          audioFiles += [audioFile]
