Why don't you slow down the audio?
Fundamental differences arise when voice artists read sentences more slowly than is natural. As a result, students find themselves unable to catch what native speakers are saying out in the real world. NativShark students get used to the way Japanese is actually pronounced from day 1 of their studies. More info can be found here.
We have additional tools such as our Shadow Loops to help with getting used to the speed and sounds of naturally pronounced Japanese.