Audio recorded on the iPad should play on a windows computer with windows media player. I don't have Windows Server 2012 to test, but I believe the issue is with your windows media player. You may have to update your media player or add a plug-in to it. A plug-in to windows media player, not a filemaker plug-in.
I tested on a windows 7 system with audio record on my ipad and the audio played on both.
Thank you for your response. The bizarre thing is that it works perfectly for the first time I log in then stops (ONLY FOR ONE ENTRY). I tried logging off then on and it did not work. I tried it a day later and it worked ONCE then stopped. I tried inserting a video taken with my iPad and it works. But it's unrealistic to do that because of the large files generated. I downloaded Window Media Player on my windows server. I read some threads that recorded sound files were not allowed in FM13 but I'm still using FMPro and FM server 12. Any other thoughts??