Added audio sounds robotic

When I add an audio file to my video, it sounds very high-pitched and robotic. I tried different editing apps (the video editing app that comes with Microsoft), and the audio works fine there. I tired converiting the audio to different formats but it did not help. I had inserted  a very similar audio a day prior and everything worked so I'm assuming neither the audio nor the format are the problem here. I tried to uninstal and re-install Rush but still did not help. At this point, I'm clueless. 

Please help. 

Thank you