I am just learning Adobe Premiere, so maybe it's a rookie mistake. I needed to reduce the noise in my audio, however DeNoise works weirdly for me. It makes some parts of my audio really quiet and some very loud. So I decided to use the legacy noise reduction feature. Which worked just fine, however when I exported my video there was an echo applied to it, which wasn't there during preview. Now, I turned off the noise reduction, but the echo is still there, moreover it is now even on the playback. And to make things worse, my playback began to stutter. It worked just fine before, but now all of a sudden the blue bar (don't know how it's called, the thing that indicates, where you are in the video) started not only lagging but going back regulary. What is happening and how do I fix it?