Tonight I played a few songs that I already knew how to play pretty well along to the original recording. Then I listened to a few other songs that I had heard dozens of times and had never played. I listened for the bass parts and...started playing along. And I got about 90% of the notes right! I still remember being at the stage where it didn't seem possible to simply listen to a recording and play along. Feeling like I needed notation or TAB just to play a song. It's really awesome. Anyone out there who's having trouble with this, keep at it. It will come! I've been playing almost 4 years now.