Windows Movie Maker reducing sound quality after video is saved.

Hey guys, recently I have been trying to make videos with WMM from windows essentials 2012.  And I upload audio content mp3 and WMV files recorded using a Blu Snowball cardioid USB microphone.  When I listen to the file in Windows player or in the preview in WMM it sounds perfect and crisp. but when I save in WMM the video audio becomes slightly fuzzy. almost like a slight robotic cracking during certain high pitch moment. And it doesn't sound nearly as good. it sounds like I am using a headphone mic or something bad. it lowers audio quality to a point where the video is still watchable but not its best.  I have tried clearing codec, I checked the 2 boxes that make WMM prepare files, I updates windows essentials.  ect...  Does anyone have any ideas why WMM would make my audio quality fuzzy and sound static in the background noise when the original mp3 or WMV (I tried both)  are perfect.   This has ruined about 3 of my youtube videos and I haven't realized it until now. I wish they could have been the way I recorded them. and im pretty discouraged.  please help.