I have some people say that they don't understand how to play by the bassline. well lets take a look at bassline. Bassline is a melody play at the lower end of the piano because you play your chords in the middle C area and you play your runs or melody at the high end of the piano. The bassline and melody go hand and hand because they both need each other. Its like koolaid the bassline is the water and the koolaid package is the melody. Well to explain more about bassline: how to hear it. well to hear the bassline on CD, Radio, Ipod, Mp3,..... you try to hear the bass gutair and follow it. I would do is write the bass note in a notebook. and to hear the melody either try hearing the lead gutair or strings or mainly hear the piano sound because likely it is usually a keyboard playing those type of sound. a tip write both bassline and melody with two different ink pen like bassline can be in red and the melody could be in blue. when you finish with hearing the bassline and melody, you try putting it together by your melody being your chords which is your right hand or sometimes it will be both hands or it might be tritones in your left hand but practice make perfect.
hope this help someone. the person who stand the storm will last in the end.