Detecting voice onsets (voicekey)

Comments

• plex84

  September 2021

  Hello @sebastiaan,

  (Sorry for my delayed reply.)

  thank you for your latest hint. I first, as you mentioned earlier, copied all the DLL files to the OS folder, and I fortunately didn't get an error message anymore! So I didn't try to run OS as admin.

  To sum up -

  • I put from psychopy import voicekey in the very beginning of my exp (in the prepare phase of an inline script) to activate the voicekey. There I also added class _BaseVoiceKey(object)[...] to activate the abstract base class for virtual voice-keys.
  • In the sequence (in which I want to measure voice onsets), right as first item, i put the following code for the class for speech onset detection (inline script, run phase):

  class OnsetVoiceKey(_BaseVoiceKey):
      """Class for speech onset detection.
  
      Uses bandpass-filtered signal (100-3000Hz). When the voice key trips,
      the best voice-onset RT estimate is saved as `self.event_onset`, in sec.
  
      """
  
  def detect(self):
          """Trip if recent audio power is greater than the baseline.
          """
          if self.event_detected or not self.baseline:
              return
          window = 5  # recent hold duration window, in chunks
          threshold = 10 * self.baseline
          conditions = all([x > threshold for x in self.power_bp[-window:]])
          if conditions:
              self.event_lag = window * self.msPerChunk / 1000.
              self.event_onset = self.elapsed - self.event_lag
              self.trip()
              self.event_time = self.event_onset
  

  What exactly does "... is saved as 'self.event_onset'" mean here?

  How can it be written into the logfile?

  Thanks in advance,

  plex84
• sebastiaan

  September 2021

  Hi @plex84 ,

  It seems that you're trying to implement your own OnsetVoiceKey class by inheriting from BaseVoiceKey . Unless you have a good reason to do that (?), this isn't necessary because this class already exists. So in theory it should be as simple as:

  from psychopy.voicekey import OnsetVoiceKey
  
  vk = OnsetVoiceKey(sec=3)
  vk.detect()
  

  And then the onset time should be available as:

  vk.event_onset
  

  That being said, for me this is only theory, because I haven't gotten this to work, neither on Ubuntu or Windows. It seems that PsychoPy's Voicekey relies on libraries that are pretty fragile. Given the proper configuration, I'm sure it works, but I just haven't managed to so far.

  — Sebastiaan

  
• plex84

  September 2021

  Hi @sebastiaan,

  thanks for your answer. I put your latest script in the inline script and the following error message occurred:

  File "C:\Program Files (x86)\OpenSesame\Lib\site-packages\libopensesame\inline_script.py", line 116, in run
     self.workspace._exec(self.crun)
   File "C:\Program Files (x86)\OpenSesame\Lib\site-packages\libopensesame\base_python_workspace.py", line 124, in _exec
     exec(bytecode, self._globals)
   Inline script, line 3, in <module>
   File "C:\Program Files (x86)\OpenSesame\Lib\site-packages\psychopy\voicekey\__init__.py", line 112, in __init__
     raise VoiceKeyException(msg)
  psychopy.voicekey.VoiceKeyException: Need a running pyo server: call voicekey.pyo_init()
  

  (Sidenote: Pyo was installed as admin a few weeks ago.)

  plex84
• sebastiaan

  September 2021

  Hi @plex84 ,

  I got the same error. A proposed solution is already in the error message, namely to call the following somewhere at the start of the experiment:

  from psychopy.voicekey import pyo_init
  pyo_init()
  

  You can try that. However, this didn't work for me either.

  — Sebastiaan