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Do they play on other computers when opened on a USB flash drive? Have you tried putting them on the desktop of a different a pc?
That's exactly how I store and use my PPTs.
View attachment 103161
They contain the audio, and can open and play them on my phone if I want via OTG, using WPS Office. Also open them on any classroom PC as well from the USB flash drive.
A bit lost here lol what is AFAIK?
WPS Office for Android can play embedded sounds in PPTs, I know because that's what I often use to review lesson materials on my phone. But that is sounds actually contained within the PPT files, as I normally have them, and NOT hot-linked from elsewhere, because that could make things messy IMO.
http://wps.com/
I have now tried WPS Office for Android and OTG from a memory stick. Microsoft for android wont play them at all.
No sound still
The files play with sound on my pc and also on the memory stick when it is plugged into the computer.