Odd Audio Feedback Issue on MacBook Pro After Using Rosetta Stone

I installed/ran Rosetta Stone v3 and it made some adjustments to my mic and other settings. Ever since I have done this I get weird feedback on any audio coming out of my MacBook pro.

It's hard to describe the sounds other than saying it's "feedback" - like the treble is cranked and there's some sort of high frequency ringy sound in the background. It happens with iTunes or any program with audio, including system alert sounds.

Sorry if this is a repost but I did a search and didn't find anything similar. Any suggestions would be helpful, thanks!