| How much theory do you know?
A good "formula" is to listen to a lot of music and learn a lot of theory. The listening will give you an idea of what you like and what sounds good and the theory knowledge will help you figure out why you like it, what it's called and how to recreate it.
What I think you're asking is, how do you create more interesting basslines.
First of all, you're already a drummer so you know about rhythm, which is half of melody. But in terms of notes, you should know about inversions, leading tones, non-chord tones, interaction between the key you're in and the chord you're playing, chord substitutions, etc. |