Sound stimuli not working online

Hello everyone!

I am currently creating an experiment where participants press a specific key to initiate a sound stimulus. The experiment was working well in the builder but when I try to run it on Pavlovia I get the following error message:

Does anyone know what this means? All the sound files (.wav) are present in the resources file in the repository so there does not seem to a problem with syncing.

What does your sound component look like.

I’d recommend you use .mp3 online. See my crib sheet for more details.

Best wishes,


Thank you for your response! I have changed the files to mp3 format but am still getting the same error message. I have created a relative path to the files in the builder, but when I look at the .js version it does not seem to be present:

Pr_sound_R = new sound.Sound({
win: psychoJS.window,
value: ‘A’,
secs: -1.0,

Could this be the problem?

What does your sound component look like in Builder?

In my crib sheet I advise against trying to create sound components in code or using alphabetical notes.


To start with I would test it by removing the duration from the sound component.

Also try using all rows. It might be that [0,3,5] will work or you could rearrange your spreadsheet and then ask for 0:3

That worked! Thank you so much!