I have a slide in my course that instructs the learner to select a PDF from the resources tab. This PDF has a button to call an audio file. When launched from the Resources tab, the audio will not play on mouse down. However, if I open the PDF from File Explorer, the audio works fine.
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current browsers (Edge, Chrome, Firefox) cannot play audio in their integrated PDF viewer
this is only possible in standalone PDF viewers (Adobe Acrobat Reader, Foxit Reader ...)