No codec support for selected audio sources

URL of experiment: untitled [PsychoPy]

Description of the problem:

Some participants have told us that they get the following error message especially on Safari. Any Ideas?

The OGG formatted audio does not appear to be supported in Safari (see https://en.wikipedia.org/wiki/HTML5_audio#Supported_audio_coding_formats). For cross-platform compatibility, the solution would be to convert all of your experimental audio files to WAV, because it is lossless (there are other options such as MP3 or AAC too).