Sound error on Pavlovia: "could not find an appropriate player" (PsychoPy 2026.1.1)

Online experiments
1

Hi everyone,

I am running an experiment on Pavlovia that includes sound files and I am getting the following error when trying to run it in pilot mode:

{"origin":"Sound.setValue","context":"when setting the sound value","error":"could not find an appropriate player."}

My setup:

  • PsychoPy version: 2026.1.1

  • PsychoJS version: 2026.1.1

  • OS: macOS

  • Browser: Chrome, Safari

  • Audio files: MP3 format

What I have already tried:

  • Converting all audio files from WAV to MP3

  • Adding audioLib: 'howler' to all new sound.Sound({}) calls in the JS file

  • Checking that all audio files are correctly uploaded to Pavlovia

  • Changing the Experiment settings and testing all 3 available audio libraries (ptb, pygames, pysound), but that generated no difference.

The audio files are correctly referenced in the JS file and are visible in the Pavlovia repository. The experiment runs without errors locally in PsychoPy. The experiment is also stored locally and not in an online repository like onedrive

Has anyone encountered this issue with version 2026.1.1? Is there a known fix for the audio player in the current PsychoJS version?

Thanks in advance!

(URL of experiment: Gaudi_allone [PsychoPy])

2

I always recommend using sound components rather than creating sound objects in code when running online.