[solved] How to use a sound sample during a reaction time task

Comments

• Edwin

  March 2014 edited March 2014

  Hi guys,

  The solution is actually very simple, if you employ a bit of inline scripting. Add the following code to the Run phase of an inline_script item directly before "experimentloop1".

  EDIT 24 March 2014, 17:19 GMT: corrected a silly mistake in the code.

  # we will need to import the library that
  # we will use to play the sound
  import pygame
  
  # first, we check if it is initialized; if it is
  # not, we initialize it
  if not pygame.mixer.get_init():
      pygame.mixer.init()
  
  # next, we will need to specify the sound
  # file (NOTE: this has to be added to your
  # file pool!
  sound_name = "example.ogg" # change to your own filename
  sound_path = exp.get_file(sound_name)
  
  # now we initialize the sound; this means
  # we prepare it so that it can be played
  exp.sound = pygame.mixer.Sound(sound_path)
  
  # finally, play the sound! (the -1 indicates
  # that it should play infinitely)
  exp.sound.play(-1)
  

  If you want the sound to pause at some point, insert the following code into an inline_script item at the point where you want it to pause:

  import pygame
  pygame.mixer.pause()
  

  And add the following to an inline_script item at the point where you want the sound to resume playing after a pause:

  import pygame
  pygame.mixer.unpause()
  

  If you want the sound to stop completely, insert the following code into an inline_script item at the point where you want it to stop:

  exp.sound.stop()
  

  As a general note: make sure that your sound is either in WAVE (.wav) or OGG (.ogg) format. If you have a different format, you can convert the sound to either WAVE or OGG via a converter (you can search for one online, there are tons).

  Good luck!
• pshahim

  March 2014 edited March 2014

  Hi Edwin,

  I've entered the code in the Run phase of the inline script. However, I get this error:

  Error: Inline script error
  In: inline_script (run phase)
  Line: 7

  Python traceback:
  AttributeError: 'module' object has no attribute 'get_init'

  Full traceback in debug window

  I have no idea what I'm doing wrong. I've literally copied and pasted your code, ive also added the file to the filepool and inserted the file name in your code. Help
• pshahim

  March 2014 edited March 2014

  Btw, this is the code as it is in our experiment right now:

  # we will need to import the library that
  # we will use to play the sound
  import pygame
  
  # first, we check if it is initialized; if it is
  # not, we initialize it
  if not pygame.get_init():
      pygame.init()
  
  # next, we will need to specify the sound
  # file (NOTE: this has to be added to your
  # file pool!
  sound_name = "5-0.wav" # change to your own filename
  sound_path = exp.get_file(sound_name)
  
  # now we initialize the sound; this means
  # we prepare it so that it can be played
  exp.sound = pygame.mixer.Sound(sound_path)
  
  # finally, play the sound! (the -1 indicates
  # that it should play infinitely)
  exp.sound.play(-1)
  
• Edwin

  March 2014 edited 4:32PM

  Hi guys,

  Terribly sorry, that's my mistake! The code below should work:

  # we will need to import the library that
  # we will use to play the sound
  import pygame
  
  # first, we check if it is initialized; if it is
  # not, we initialize it
  if not pygame.mixer.get_init():
      pygame.mixer.init()
  
  # next, we will need to specify the sound
  # file (NOTE: this has to be added to your
  # file pool!
  sound_name = "5-0.wav" # change to your own filename
  sound_path = exp.get_file(sound_name)
  
  # now we initialize the sound; this means
  # we prepare it so that it can be played
  exp.sound = pygame.mixer.Sound(sound_path)
  
  # finally, play the sound! (the -1 indicates
  # that it should play infinitely)
  exp.sound.play(-1)
  

  Simply forgot to add the .mixer in the initialization bit. I've updated my previous post as well, for future reference.

  Good luck!
• pshahim

  March 2014 edited 4:32PM

  Hi Edwin,

  IT WORKS! Thank you so much!
• Edwin

  March 2014 edited 4:32PM

  No problem, glad that it works! Marking this as solved.