Uploading, playing and Sharing MP3's

Hi,

Was wondering if any can assist.

A team want to upload MP3's from OneDrive accounts.

They seem to be having issues with syncing 

The files are received via Email in MP4 format and saved in a SP folder

It is converted to an MP3 and saved in the same folder.

Another case handler may then try to access the MP3 for typing (importing it in to Speech Exec) and it does not appear in the SharePoint folder. This person then has to access the original email, save the MP4 and convert to MP3 themselves in order to access it.

This has to be done by each employee who needs to type. This can be up to 4 different people.

The users who need to play these have the permission of Edit and 

Is there a simpler way to make these accessible??

Regards

Chris