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I work for a university. Some faculty distribute their lectures as Powerpoint slideshows with embedded audio. The audio works fine for most students, but a few are having issues. All the students have Powerpoint 2010.

If I extract the audio from the Powerpoint slide (by changing it to a zipfile), the audio clips play just fine on the student's computer. This ensures it is not a problem with the audio being embedded improperly or using a codec they do not have available.


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up vote 1 down vote accepted

Over a year later, I found the answer!

The issue is related to execution protection. If you remove the 'fetched from the Internet' attribute from the file then Powerpoint will play the audio.

enter image description here

Solution: Just click Unblock on the bottom of the properties for the PowerPoint file. When you next open it, the audio will play.

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+1 for coming back a year later and giving the answer so people like me who came her on 07/23/2012 (or later) can learn. Bravo Zulu. – Michael Riley - AKA Gunny Jul 23 '12 at 23:20

That's a weird one for sure... :) If the workstations in question are running Vista or 7, ensure that PowerPoint hasn't been muted/turned down in the audio Mixer (Vista+ allows per-application volume settings in the mixer).

Vista Mixer Button Mixer Open

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Yeah, that was the first thing I checked. I forgot to mention that it is not app specific volume. – Myrddin Emrys Jul 18 '11 at 17:37

I had the same problem. I checked the properties and the file was not blocked. Eventually I discovered that I had to download DivX software to play the audio

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This would be a potential fix, except that the audio plays when extracted from the Zip (and I can see that the WAVs do not contain any unusually encoded audio). It's not a codec issue. – Myrddin Emrys May 17 at 13:07

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