title: pygame: how do I get my game to actually run at 60fps?
body: <p>In my main loop I have:</p>
  
  <pre><code>clock.tick_busy_loop(60)
  pygame.display.set_caption("fps: " + str(clock.get_fps()))
  </code></pre>
  
  <p>However, the readout says the game is reading at 62.5fps.
  I then tried to input <code>clock.tick_busy_loop(57.5)</code>, which gave me a readout of 58.82...fps. When I set <code>clock.tick_busy_loop(59)</code> I get 62.5fps again. It looks like there is a threshold between 58.8fps and 62.5fps that I can't overcome here. How do I get my game to actually run at 60fps? I'm mainly looking for this kind of control because I executing events that are contingent on musical timing.</p>