Volume control for sampler item

Comments

• eduard

  May 2017

  Hi Cagdas,

  Maybe this script here, will help you get started:

  Most importantly, you should note that it doesn't use Opensesame Items (sampler, loop), but all "the magic" happens in an inline_script, by calling those functions directly.

  src1 = exp.pool['a.ogg']
  my_sampler1 = sampler(src1)
  src2 = exp.pool['b.ogg']
  my_sampler2 = sampler(src2)
  src3 = exp.pool['c.ogg']
  my_sampler3 = sampler(src3)
  samplers = [my_sampler1,my_sampler2,my_sampler3]
  kb = keyboard(keylist=['left','right','top','down','return','SPACE'])
  
  cv = canvas()
  sIdx = 0 
  my_sampler1.play()
  my_sampler2.play()
  my_sampler3.play()
  no_sounds = 3
  while True:
      k,t = kb.get_key(timeout=20)
      if k == 'return':
          break
  
      elif k == 'up':
          sIdx -= 1
      elif k == 'down':
          sIdx += 1
      elif k == 'right':
          if samplers[sIdx%no_sounds].volume < 1:
              samplers[sIdx%no_sounds].volume += 0.05
      elif k == 'left':
          if samplers[sIdx%no_sounds].volume > 0:
              samplers[sIdx%no_sounds].volume -= 0.05
  
      text = "Adjust volume of sound %s. \n\n\nCurrent volume  is %s"%(sIdx%no_sounds,samplers[sIdx%no_sounds].volume)
      cv.clear()
      cv.text(text)
      cv.show()
  
  
  #my_sampler1.play()
  

  I hope it makes sense. Let me know if you need more explanation.

  Eduard

  
• cagdas_bostanci

  May 2017

  Thank you Eduard, I will be looking into it.
• cagdas_bostanci

  June 2017 edited June 2017

  Hi again, the code works fine and answered all my above questions. Only I couldn't solve the timing issue. I want certain delays in between the sampler items, so i used the sleep function as below

         my_sampler1.play()
          clock.sleep(750)
          my_sampler2.play()
          clock.sleep(750)
          my_sampler3.play()
          clock.sleep(2000)
  

  The problem is that the volume cannot be adjusted during the loop, but it needs to wait until all the items run once, which makes the session very slow and hard to control. Is there another way that i could put delays and also get faster response to keypresses?
• eduard

  June 2017

  Hi Cagdas,

  I don't really get what you mean exactly. You start playing the samplers before the loop, so even if you have those intervals between them, they will overlap once the last sounds begins to play (unless you have very short samples). In the loop itself you can easily adjust the volume online, it will change them right away. At least it does so for me.

  If your version is different, would you mind uploading it, so I can have a look?
  Eduard

  
• cagdas_bostanci

  June 2017

  Hi,
  Actually the code is not different, except that the above code is inserted just after the while true statment. I have very short samples, which are indeed 4x70ms clicks playing continously. Since the volume level ascends and descends in 0.02 steps, I wonder if there is a way to apply several keypresses during the loop, so that the next loop, for example, can start 0.08 step higher. Otherwise, it still works, but each keypress must wait until the the loop is finished.

  One more thing, my advisor said that it is strange that the number of clicks displayed starts from 0. Is there a way to call the first item in the samplers list as 1 instead of 0. Tried to change sIdx to 1 but didn't work.

  Thanks a lot.
• eduard

  June 2017

  Hi,

  Is there a way to call the first item in the samplers list as 1 instead of 0

  Change this line: text = "Adjust volume of sound %s. \n\n\nCurrent volume is %s"%(sIdx%no_sounds,samplers[sIdx%no_sounds].volume)

  to:

  text = "Adjust volume of sound %s. \n\n\nCurrent volume is %s"%((sIdx%no_sounds)+1,samplers[sIdx%no_sounds].volume)

  I have very short samples, which are indeed 4x70ms clicks playing continously.

  So, there is no overlap? How about this code below.Instead of sleeping in between the samples, this code samples key strokes. So, in theory you can update the volume almost continuously.

  src1 = exp.pool['a.ogg']
  my_sampler1 = sampler(src1)
  src2 = exp.pool['b.ogg']
  my_sampler2 = sampler(src2)
  src3 = exp.pool['c.ogg']
  my_sampler3 = sampler(src3)
  samplers = [my_sampler1,my_sampler2,my_sampler3]
  kb = keyboard(keylist=['left','right','top','down','return','SPACE'])
  
  cv = canvas()
  sIdx = 0 
  no_sounds = 3
  
  while True: 
      my_sampler1.play()
      t0 = clock.time()
      while clock.time()-t0<750:
          k1,t1 = kb.get_key(timeout=10)
          if k == 'right':
               if samplers[sIdx%no_sounds].volume < 1:
                   samplers[sIdx%no_sounds].volume += 0.05
          elif k == 'left':
               if samplers[sIdx%no_sounds].volume > 0:
                   samplers[sIdx%no_sounds].volume -= 0.05
          kb.flush()
      my_sampler2.play()
      t0 = clock.time()
      while clock.time()-t0<750:
          k1,t1 = kb.get_key(timeout=10)
          if k == 'right':
               if samplers[sIdx%no_sounds].volume < 1:
                   samplers[sIdx%no_sounds].volume += 0.05
          elif k == 'left':
               if samplers[sIdx%no_sounds].volume > 0:
                   samplers[sIdx%no_sounds].volume -= 0.05
          kb.flush()
      my_sampler3.play()
      t0 = clock.time()
      while clock.time()-t0<2000:
          k1,t1 = kb.get_key(timeout=10)
          if k == 'right':
               if samplers[sIdx%no_sounds].volume < 1:
                   samplers[sIdx%no_sounds].volume += 0.05
          elif k == 'left':
               if samplers[sIdx%no_sounds].volume > 0:
                   samplers[sIdx%no_sounds].volume -= 0.05
          kb.flush()
  
      k,t = kb.get_key(timeout=200)
      if k == 'return':
          break
      elif k == 'up':
          sIdx -= 1
      elif k == 'down':
          sIdx += 1
      elif k == 'right':
          if samplers[sIdx%no_sounds].volume < 1:
              samplers[sIdx%no_sounds].volume += 0.05
      elif k == 'left':
          if samplers[sIdx%no_sounds].volume > 0:
              samplers[sIdx%no_sounds].volume -= 0.05
  
      text = "Adjust volume of sound %s. \n\n\nCurrent volume  is %s"%(sIdx%no_sounds,samplers[sIdx%no_sounds].volume)
      cv.clear()
      cv.text(text)
      cv.show()
  

  Hope this works ( I didn't test it).
  Eduard