track is E - G - A slap/popped octaves with some tripplets.
The sound should be clear enough to where you can hear the note clearly, but it should also have a percussive attack.
One thing I had problems with when I first started was "snapping" my thumb off the string. If you hit too hard, or your strings are too low, you'll get a dead sound with no real sustain. When you get the hang of it, you'll notice it's like you're snapping your thumb back up just as it hits the string and intertia does the rest.
Higher Ground is a good beginner song. Play it sloooooow and work on snapping your wrist. I usually "slap" my desk at work when I'm listening to music.
