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Playing soundfiles with Excel using a loop

I am trying to play soundfiles (.wav) through a loop. The soundfiles work perfectly fine if i type them in directly, but if i want the loop to put in the soundfiles with an Excel file I get an Error:

“value error: nonbrodcastable output operant with shape (128,1) doesn’t match the brodcast shape (128,2)”

This is the code shown in the script:
#!/usr/bin/env python

-- coding: utf-8 --

This experiment was created using PsychoPy2 Experiment Builder (v1.90.2),
on Juni 02, 2018, at 11:02
If you publish work using this script please cite the PsychoPy publications:
Peirce, JW (2007) PsychoPy - Psychophysics software in Python.
Journal of Neuroscience Methods, 162(1-2), 8-13.
Peirce, JW (2009) Generating stimuli for neuroscience using PsychoPy.
Frontiers in Neuroinformatics, 2:10. doi: 10.3389/neuro.11.010.2008

from future import absolute_import, division
from psychopy import locale_setup, sound, gui, visual, core, data, event, logging, clock
from psychopy.constants import (NOT_STARTED, STARTED, PLAYING, PAUSED,
import numpy as np # whole numpy lib is available, prepend ‘np.’
from numpy import (sin, cos, tan, log, log10, pi, average,
sqrt, std, deg2rad, rad2deg, linspace, asarray)
from numpy.random import random, randint, normal, shuffle
import os # handy system and path functions
import sys # to get file system encoding

Ensure that relative paths start from the same directory as this script

_thisDir = os.path.dirname(os.path.abspath(file)).decode(sys.getfilesystemencoding())

Store info about the experiment session

expName = ‘BA Experiment’ # from the Builder filename that created this script
expInfo = {‘session’: ‘001’, ‘participant’: ‘’}
dlg = gui.DlgFromDict(dictionary=expInfo, title=expName)
if dlg.OK == False:
core.quit() # user pressed cancel
expInfo[‘date’] = data.getDateStr() # add a simple timestamp
expInfo[‘expName’] = expName

Data file name stem = absolute path + name; later add .psyexp, .csv, .log, etc

filename = thisDir + os.sep + u’data/%s%s_%s’ % (expInfo[‘participant’], expName, expInfo[‘date’])

An ExperimentHandler isn’t essential but helps with data saving

thisExp = data.ExperimentHandler(name=expName, version=’’,
extraInfo=expInfo, runtimeInfo=None,
savePickle=True, saveWideText=True,

save a log file for detail verbose info

logFile = logging.LogFile(filename+’.log’, level=logging.EXP)
logging.console.setLevel(logging.WARNING) # this outputs to the screen, not a file

endExpNow = False # flag for ‘escape’ or other condition => quit the exp

Start Code - component code to be run before the window creation

Setup the Window

win = visual.Window(
size=(1024, 768), fullscr=True, screen=0,
allowGUI=False, allowStencil=False,
monitor=‘testMonitor’, color=[0,0,0], colorSpace=‘rgb’,
blendMode=‘avg’, useFBO=True)

store frame rate of monitor if we can measure it

expInfo[‘frameRate’] = win.getActualFrameRate()
if expInfo[‘frameRate’] != None:
frameDur = 1.0 / round(expInfo[‘frameRate’])
frameDur = 1.0 / 60.0 # could not measure, so guess

Initialize components for Routine “trial”

trialClock = core.Clock()
sound_1 = sound.Sound(‘A’, secs=-1)

Create some handy timers

globalClock = core.Clock() # to track the time since experiment started
routineTimer = core.CountdownTimer() # to track time remaining of each (non-slip) routine

set up handler to look after randomisation of conditions etc

trials = data.TrialHandler(nReps=1, method=‘random’,
extraInfo=expInfo, originPath=-1,
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))

# ------Prepare to start Routine "trial"-------
t = 0
trialClock.reset()  # clock
frameN = -1
continueRoutine = True
# update component parameters for each repeat
sound_1.setSound(sounds, secs=-1)
# keep track of which components have finished
trialComponents = [sound_1]
for thisComponent in trialComponents:
    if hasattr(thisComponent, 'status'):
        thisComponent.status = NOT_STARTED

# -------Start Routine "trial"-------
while continueRoutine:
    # get current time
    t = trialClock.getTime()
    frameN = frameN + 1  # number of completed frames (so 0 is the first frame)
    # update/draw components on each frame
    # start/stop sound_1
    if t >= 0.0 and sound_1.status == NOT_STARTED:
        # keep track of start time/frame for later
        sound_1.tStart = t
        sound_1.frameNStart = frameN  # exact frame index  # start the sound (it finishes automatically)
    # check if all components have finished
    if not continueRoutine:  # a component has requested a forced-end of Routine
    continueRoutine = False  # will revert to True if at least one component still running
    for thisComponent in trialComponents:
        if hasattr(thisComponent, "status") and thisComponent.status != FINISHED:
            continueRoutine = True
            break  # at least one component has not yet finished
    # check for quit (the Esc key)
    if endExpNow or event.getKeys(keyList=["escape"]):
    # refresh the screen
    if continueRoutine:  # don't flip if this routine is over or we'll get a blank screen

# -------Ending Routine "trial"-------
for thisComponent in trialComponents:
    if hasattr(thisComponent, "setAutoDraw"):
sound_1.stop()  # ensure sound has stopped at end of routine
# the Routine "trial" was not non-slip safe, so reset the non-slip timer

completed 1 repeats of ‘trials’

these shouldn’t be strictly necessary (should auto-save)


make sure everything is closed down

thisExp.abort() # or data files will save again on exit

I am using Psychopy Standalone version 1.90.2 on Win10.

This is the full error message:

(I have selected the Set every repeat option for a variable parameter to my Component and there is no typo in the name)

Hi @publu. I had to debug a similar issue last week. Basically, sounddevice is expecting a mono-track here, whilst your audio is probably in stereo. A simple work-around is to convert your files to mono, for example with audacity.

Otherwise, since the sound-widget doesn’t have many options itself, you could use some code to import sounddevice and set channels = 2. Or try using pygame.

Thats good, and you can also initialise the sound object setting the stereo parameter as True, as the stereo parameter controls the number of channels e.g.,

mySound = sound.Sound('A', secs=-1, stereo=True)