Для эксперимента я использую PsychoPy 3.0, программное обеспечение с открытым исходным кодом, которое запускается Python. Я надеюсь воспроизвести два отдельных файла .wav одновременно для разборчивости эксперимента; один файл - это речевой стимул, а другой - болтовня. Суть в том, что я хотел бы, чтобы эксперимент случайно выбрал часть болтовни, которая будет воспроизводиться вместе с файлом речевых стимулов (чтобы избежать того же сегмента речевой болтовни, воспроизводимой с каждым клипом речевых стимулов).
I удалось создать эксперимент, в котором два звуковых файла представлены одновременно; тем не менее, болтовня .wav файл всегда воспроизводится с начала файла; Я бы хотел, чтобы python / PsychoPy рандомизировал, когда он воспроизводится в файле babble.wav. Я использую звуковой движок Psychtoolbox (PsychPortAudio) для управления звуком.
Я приложил часть кода для воспроизведения двух волновых файлов, скомпилированных из PsychoPy. Переменная sound_2 - это файл болтового шума, который я хотел бы рандомизировать. Спасибо за любую помощь, которую вы можете предложить!
-Brandon
# ------Prepare to start Routine "SpeakerStimPrac"-------
# update component parameters for each repeat
sound_1.setSound(Sound, secs=Duration+0.5, hamming=True)
sound_1.setVolume(1, log=False)
sound_2.setSound(Noise, secs=Duration+1.5, hamming=True)
sound_2.setVolume(0.85, log=False)
# keep track of which components have finished
SpeakerStimPracComponents = [sound_1, text_5, sound_2]
for thisComponent in SpeakerStimPracComponents:
thisComponent.tStart = None
thisComponent.tStop = None
thisComponent.tStartRefresh = None
thisComponent.tStopRefresh = None
if hasattr(thisComponent, 'status'):
thisComponent.status = NOT_STARTED
# reset timers
t = 0
_timeToFirstFrame = win.getFutureFlipTime(clock="now")
SpeakerStimPracClock.reset(-_timeToFirstFrame) # t0 is time of first possible flip
frameN = -1
continueRoutine = True
# -------Run Routine "SpeakerStimPrac"-------
while continueRoutine:
# get current time
t = SpeakerStimPracClock.getTime()
tThisFlip = win.getFutureFlipTime(clock=SpeakerStimPracClock)
tThisFlipGlobal = win.getFutureFlipTime(clock=None)
frameN = frameN + 1 # number of completed frames (so 0 is the first frame)
# update/draw components on each frame
# start/stop sound_1
if sound_1.status == NOT_STARTED and tThisFlip >= 1.5-frameTolerance:
# keep track of start time/frame for later
sound_1.frameNStart = frameN # exact frame index
sound_1.tStart = t # local t and not account for scr refresh
sound_1.tStartRefresh = tThisFlipGlobal # on global time
sound_1.play(when=win) # sync with win flip
if sound_1.status == STARTED:
# is it time to stop? (based on global clock, using actual start)
if tThisFlipGlobal > sound_1.tStartRefresh + Duration+0.5-frameTolerance:
# keep track of stop time/frame for later
sound_1.tStop = t # not accounting for scr refresh
sound_1.frameNStop = frameN # exact frame index
win.timeOnFlip(sound_1, 'tStopRefresh') # time at next scr refresh
sound_1.stop()
# *text_5* updates
if text_5.status == NOT_STARTED and tThisFlip >= 0.0-frameTolerance:
# keep track of start time/frame for later
text_5.frameNStart = frameN # exact frame index
text_5.tStart = t # local t and not account for scr refresh
text_5.tStartRefresh = tThisFlipGlobal # on global time
win.timeOnFlip(text_5, 'tStartRefresh') # time at next scr refresh
text_5.setAutoDraw(True)
if text_5.status == STARTED:
# is it time to stop? (based on global clock, using actual start)
if tThisFlipGlobal > text_5.tStartRefresh + .5-frameTolerance:
# keep track of stop time/frame for later
text_5.tStop = t # not accounting for scr refresh
text_5.frameNStop = frameN # exact frame index
win.timeOnFlip(text_5, 'tStopRefresh') # time at next scr refresh
text_5.setAutoDraw(False)
# start/stop sound_2
if sound_2.status == NOT_STARTED and tThisFlip >= .5-frameTolerance:
# keep track of start time/frame for later
sound_2.frameNStart = frameN # exact frame index
sound_2.tStart = t # local t and not account for scr refresh
sound_2.tStartRefresh = tThisFlipGlobal # on global time
sound_2.play(when=win) # sync with win flip
if sound_2.status == STARTED:
# is it time to stop? (based on global clock, using actual start)
if tThisFlipGlobal > sound_2.tStartRefresh + Duration+1.5-frameTolerance:
# keep track of stop time/frame for later
sound_2.tStop = t # not accounting for scr refresh
sound_2.frameNStop = frameN # exact frame index
win.timeOnFlip(sound_2, 'tStopRefresh') # time at next scr refresh
sound_2.stop()
# check for quit (typically the Esc key)
if endExpNow or defaultKeyboard.getKeys(keyList=["escape"]):
core.quit()
# check if all components have finished
if not continueRoutine: # a component has requested a forced-end of Routine
break
continueRoutine = False # will revert to True if at least one component still running
for thisComponent in SpeakerStimPracComponents:
if hasattr(thisComponent, "status") and thisComponent.status != FINISHED:
continueRoutine = True
break # at least one component has not yet finished
# refresh the screen
if continueRoutine: # don't flip if this routine is over or we'll get a blank screen
win.flip()
# -------Ending Routine "SpeakerStimPrac"-------
for thisComponent in SpeakerStimPracComponents:
if hasattr(thisComponent, "setAutoDraw"):
thisComponent.setAutoDraw(False)
sound_1.stop() # ensure sound has stopped at end of routine
trials_2.addData('sound_1.started', sound_1.tStartRefresh)
trials_2.addData('sound_1.stopped', sound_1.tStopRefresh)
trials_2.addData('text_5.started', text_5.tStartRefresh)
trials_2.addData('text_5.stopped', text_5.tStopRefresh)
sound_2.stop() # ensure sound has stopped at end of routine
trials_2.addData('sound_2.started', sound_2.tStartRefresh)
trials_2.addData('sound_2.stopped', sound_2.tStopRefresh)
# the Routine "SpeakerStimPrac" was not non-slip safe, so reset the non-slip timer
routineTimer.reset()
# set up handler to look after randomisation of conditions etc
trials = data.TrialHandler(nReps=1, method='random',
extraInfo=expInfo, originPath=-1,
trialList=data.importConditions('intresponse.xlsx'),
seed=None, name='trials')
thisExp.addLoop(trials) # add the loop to the experiment
thisTrial = trials.trialList[0] # so we can initialise stimuli with some values
# abbreviate parameter names if possible (e.g. rgb = thisTrial.rgb)
if thisTrial != None:
for paramName in thisTrial:
exec('{} = thisTrial[paramName]'.format(paramName))
for thisTrial in trials:
currentLoop = trials
# abbreviate parameter names if possible (e.g. rgb = thisTrial.rgb)
if thisTrial != None:
for paramName in thisTrial:
exec('{} = thisTrial[paramName]'.format(paramName))