Viber's Voice message files are located in :
directory, and they don't have any extension format on them. so, I'm looking for a solution to convert them to a
common audio file format.
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I suppose you have voice tags on your phone or tablet. They are in the folder
sdcard/Viber/media/PTT. They are designated by numbers 1, 2, ... without the extension.
First you need to install Viber on your computer.
Install Audacity on the PC as well.
Run Viber on the PC and let send a short voice message from somebody to you. If this is the first report after installation, it will be labelled "1" and will be in the
\users\% username%\documents\ viberdownloads\ppt .