Boom – simple sound effects

Adding sound effects in Kivy is very simple. Here is the code for boom.py, which is going to produce a sound every time a Shot or Missile is fired:

52. # File name: boom.py
53. from kivy.uix.image import Image
54. from kivy.core.audio import SoundLoader
55. 
56. class Boom(Image):
57.   sound = SoundLoader.load(boom.wav')
58.   def boom(self, **kwargs):
59.     self.__class__.sound.play()
60.     super(Boom, self).__init__(**kwargs)

Reproducing a sound involves the use of two classes, Sound and SoundLoader (line 54). SoundLoader loads an audio file (.wav) and returns a Sound instance (line 57) that we keep in the sound reference (a static attribute of the Boom class). We play sound every time a new Boom instance is created.