[open] Stop Sampler playing music (using key e.g. ENTER)

Comments

• OlaNordrum

  January 2016 edited 4:09PM

  It would actually be nice to be able to include a white screen/ canvas during the 3 seconds of music playing without the sentence.
• eduard

  January 2016 edited January 2016

  Hi Ola,

  What Josh suggested in the other thread is a good way to solve your issue. So, basically, instead of using the sampler item, you should play the files from within an inline_script, actually, two inline_scripts.

  First, you replace the sampler with the first inline_script and put this code into it:

  import pygame # import modul
  pygame.mixer.init() # initialize mixer (doing this once might be enough)
  sound_file = exp.get_file(filename) # load the sound file of a single trial
  sound = pygame.mixer.Sound(sound_file) # create an instance of the sound
  sound.play() # play the sound
  
  cv = canvas()
  cv.background_color = 'white'
  cv.show()
  clock.sleep(3000)
  

  Then, you do the other stuff you intended to present, as soon as subjects pressed a key (specify with the allowed_response argument, whichever you want). After your keyboard_response , e.g. as last thing to be executed before you start the next trial, in which you place the single line: sound.stop(). Et voila, there you go.

  Let us know, if this worked out for you.

  Good luck,

  Eduard

  
• OlaNordrum

  January 2016 edited January 2016

  NO it doesn't work. Have three inline scripts at the moment. None of them are doing what they are supposed to do.
  script one RUN

  cv = canvas(exp)
  cv.background_color = 'white'
  sound.play() 
  
  cv.show()
  clock.sleep(3000) ... this doesn't work as it is not defined. 
  

  script one prepare

  import pygame 
  
  pygame.mixer.init() 
  sound_file = exp.get_file("300bpm.wav") 
  #... THIS is also a problem as when I used the sampler I could call my variable # [Noise] which included FOUR sound files. 
  sound = pygame.mixer.Sound(sound_file) 
  
  
  from openexp.canvas import canvas
  

  script two Prepare

  import csv 
  import random 
  list()
  
  image_path = exp.get_file('ops.csv')
  with open(image_path, 'rU') as csvfile:
      reader = csv.DictReader(csvfile, delimiter=',')
      full_list = list(reader)
      random.shuffle(full_list)
      trial_info = full_list.pop(0)
  
      sentence = trial_info['sentences'] 
      question = (trial_info['question'] +"\n \nYES (Y)             NO (N)"+'\n')
      answer = trial_info['answer']
      item = trial_info['item']
  
  
      print(item)
      print(answer) 
      print(sentence) 
      print(question) 
  

  script two run

  from openexp.canvas import canvas
  my_canvas = canvas(exp)
  my_canvas.text(sentence, center=True, x=None, y=None, max_width=None, color=None, bidi=None, html=True)
  my_canvas.show() 
  
  allowed_response = "ENTER"
  keybord_response = "ENTER"
  sound.stop()
  

  not working.. the music stops playing after 3 ms so no music here and keyboard response doesn't work.

  Sorry. Just getting slightly frustrated as nothing is working at the moment.
• eduard

  January 2016 edited 4:09PM

  clock.sleep(3000) ... this doesn't work as it is not defined.

  I suppose you are running Opensesame 2.9.x? In this case clock.time() is not defined, right. Instead, you can use self.time(3000); it will have the same effect.

  sound_file = exp.get_file("300bpm.wav") ... Thisis also a problem as when I used the sampler I could call my variable # [Noise]

  Why? You can still do exact same thing. The only difference is, that you have retrieve your [Noise] variable (I suppose you define it in the loop_table):

  noise = exp.get(Noise)

  sound_file = exp.get_file(noise)

  allowed_response = "ENTER"
  keybord_response = "ENTER"
  sound.stop()

  This won't work. I either you go entirely for the option of doing this with inline_scripts. Then, I highly recommend you checking out the documentation of how to do things with inline_scripts.

  Basically, something like this will do the trick:

  from openexp.keyboard import keyboard
  kb = keyboard(exp,keylist= ['ENTER'],timeout = 27000) # waits for 27 seconds
  kb.get_key()
  
  sound.stop()
  

  Alternatively, you just use the keyboard item as you did before, and add another inline_script later on.

  I hope things make more sense now. No reason to despair.

  Eduard