| The bass is quite clear in this example. And doesnt stray very far from the chord structure either. Are you having trouble with certain parts? This is ear training! Its great to have, and every bit you practice makes you a better player!
First thing i do when learning stuff like this...is play through and find the roots of each chord...ignoring the noodles. Then once i know the progression, its easy to add the fils since i know where i need to end up for my next note.
Theres much more...but its how i start... | 
