[pygame] Does pygame execute on a separate process/thread?

[Deven Hickingbotham]

When playing an audio file (pygame.mixer.music.play()) I have always 
assumed that this executed in a process or thread separate from the main 
thread since the call to play was non blocking.  Just wanted to confirm 
that here.

I'm running debian 8.0, Python 3.4.2, pygame 1.9.2a0, SDL 1.2.15.