Random picking of sounds as variables

Comments

• sebastiaan

  March 12

  Hi Aurélien,

  I don't fully understand what you're trying to do. It seems like the loop table is correct the way it is, right? Is it a matter of selecting the right sound file based on the experimental variables that you've specified in the table? I.e. do you want to map these variables onto a file name? Details would be helpful 😊

  Cheers!

  Sebastiaan

  There's much bigger issues in the world, I know. But I first have to take care of the world I know.
  cogsci.nl/smathot
• Aurélien

  March 12

  Hi Sebastiaan,

  Thank you very much for your answer. I advanced a little. I had one problem with this loop : I need to play sequentially [silent] with [condition] (for example, I need to play sequentially the [sentences] of [silent]=0 and [condition]=a, so 8 sentences).

  I'll try to be as clear as I could. So, in the most simple way, what I need is to define a variable (a category of sound) and fill it with random sounds in the pool. Because all my files, in this example, are named like '20p(number).wav', here is what I thought I should do :

  import random
  I = random.sample(range(96),8) #I have 96 possible sounds and I want 8 of them (randomly)
  var.set('20p',I) #assign to the condition 20p all the possible values
  

  So, theoretically, I now have one condition '20p' with 8 values, each corresponds to a real .wav file (for example '20p1.wav').

  What I need now, is two things :

  1) implement all values of 20p in a loop, so the loop will run randomly the 8 values (20p1 ... 20p6... 20p24...)

  2) play each 8 values in a sampler. I thought to do this in the script of the sampler :

  set sample "20p[I].wav"
  

  but if I do this, it will try to find something like '20p[0 1 2 3 4 5].wav' and not '20p0.wav'.

  Maybe, this is to much for one post !

  Thank you again,

  Cheers,

  Aurélien.
• sebastiaan

  March 13

  Hi Aurélien,

  Ok—it's still not entirely clear to me, but I do see at least one basic confusion: The variable 20p is a list of multiple values. But then you're trying to use it as though it's a single value when you specify the sampler. And that's where things go wrong. Does that make sense?

  What I would do is first define a random list at the start of the experiment (or the start of the block if appropriate):

  import random
  sound_indices = random.sample(range(96), 8)
  

  And then, at the start of the trial, you randomly 'pop' one element from that list and use it in the sampler.

  var.current_sound_index = sound_indices.pop()
  

  Something along those lines should get you what you want, I believe.

  Cheers,

  Sebastiaan

  There's much bigger issues in the world, I know. But I first have to take care of the world I know.
  cogsci.nl/smathot
• Aurélien

  March 13

  Hi Sebastiaan,

  Thank you for your advices, I solved the problem! I generated random value and assign them to my var :

  import random
  import string
  I = random.sample(range(1,97),8)
  var.i1=I[0]
  var.i2=I[1]
  var.i3=I[2]
  var.i4=I[3]
  var.i5=I[4]
  var.i6=I[5]
  var.i7=I[6]
  var.i8=I[7]
  

  I put the script in the bloc sequence so it generate new random numbers every iteration (at last, I think...) and i1 to i8 are the value of sentences. Than, i1 to i8 where assigned to the variable [value] in a loop.

  So if the sample play [value] for i1 = 12, the sample will find and play the file 12.wav.

  Next step will be to access sound files not in the pool but in the experiment folder because I have 96*12 files. I will post the final step (hope it could help someone even if it is a bit messy :) )

  Cheers,

  Aurélien.
• sebastiaan

  March 13

  Good to hear! 💪

  There's much bigger issues in the world, I know. But I first have to take care of the world I know.
  cogsci.nl/smathot
• Aurélien

  March 21

  Here I am with more info !

  So, if you want to play sounds as variable and randomly picking them from a file, here is one way to do it (I picked some lines of the script in this forum so thanks to everybody ! )

  
  

  import os

  import random

  #set path and list for conditions

  folder = r'C:\Users\condition'

  list = []

  
  

  
  

   for file in os.listdir(folder): # 'file' can be replaced by any 'name'

   if file.endswith('.wav'): #for other type of files

        path = os.path.join(folder, file)

        list.append(path)

  
  

  So now, you have a list with path of .wav files.

  Let say, you want to pick 8 random '.wav' from it to set a variable name sound:

  sound = random.sample(list,8)

  Now, you want to play them without repetition, place this in the beginning of the sequence :

  play = sound.pop() #every time play is executed, the file executed will be removed from the list

  var.play = play #set the variable 'play' for the sampler

  Here you are.

  I think it works !