func checkCurrentTime(playerTimeMilliseconds: Int) {

  for (millisecond, beatCount) in beatCounts {
    if  playerTimeMilliseconds == millisecond {
       //show beatCount in label on UI
     }
 }
}





func playSound(url: URL) {

    let playerItem: AVPlayerItem = AVPlayerItem(url: url)
    player = AVPlayer(playerItem: playerItem)


    try! AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
    try! AVAudioSession.sharedInstance().setActive(true)
    player?.play()

    player?.addPeriodicTimeObserver(forInterval: CMTimeMakeWithSeconds(1, 1000), queue: DispatchQueue.main, using: { [weak self] (CMTime) in

        print("cmtime is (CMTime)")
      CMTime.value

        if self?.player?.currentItem?.status == .readyToPlay {

        }
    })

}//end playSound