private void Update()
        {
            if (musicSource != null)
            {
                musicSource.volume = volume;
            }

            if (VirtualKey.GetKeyDown(VK.VK_MEDIA_STOP) || KeyCodeUtils.GetKeyDown(Config.StopKey))
            {
                stopped = true;
                paused  = false;
                Stop();
            }
            if (VirtualKey.GetKeyDown(VK.VK_MEDIA_PLAY_PAUSE) || KeyCodeUtils.GetKeyDown(Config.PlayPauseKey))
            {
                if (!stopped)
                {
                    Pause();
                }
                else
                {
                    stopped         = false;
                    paused          = false;
                    timeOfLastMusic = Time.time;
                    var filename = OST.Concat(CustomMusic).First(x => x.Value == musicSource.clip).Key;
                    musicSource.Play();
                }
            }
            if (VirtualKey.GetKeyDown(VK.VK_MEDIA_NEXT_TRACK) || KeyCodeUtils.GetKeyDown(Config.NextTrackKey))
            {
                NextTrack();
            }
            if (VirtualKey.GetKeyDown(VK.VK_MEDIA_PREV_TRACK) || KeyCodeUtils.GetKeyDown(Config.PreviousTrackKey))
            {
                if (CurrentTrackIndex > 0 && Time.time - timeOfLastMusic <= 1)
                {
                    PreviousTrack();
                }
                else
                {
                    Stop();
                    timeOfLastMusic = Time.time;
                    var filename = OST.Concat(CustomMusic).First(x => x.Value == musicSource.clip).Key;
                    musicSource.Play();
                }
            }
        }