public BeatSequence HardRewindBySeconds(double seconds)
 {
     if (seconds <= 0)
     {
         throw new ArgumentOutOfRangeException(nameof(seconds), seconds, "Must be greater than zero.");
     }
     return(HardRewindByBeats(BeatPositioner.TimeDeltaToBeatDelta(seconds)));
 }
 public BeatSequence DeleteAllInLastSecondsRange(double seconds)
 {
     if (seconds <= 0)
     {
         throw new ArgumentOutOfRangeException(nameof(seconds), seconds, "Must be greater than zero.");
     }
     return(DeleteAllInLastBeatsRange(BeatPositioner.TimeDeltaToBeatDelta(seconds)));
 }