In general a rolling bassline sounds like an arping deep synth, or a fast paced bass constantly plucking, but we're going to take that step further into making more complex and better sounding basslines
You will have to already know how to make a simple rolling bassline, side chain compress, use delays, reverbs and equalizers before you can understand how to make this because i will not be going through those basics
These types of basslines are commonly found in uplifting trance tracks, and if you ever wondered how to make one here is how you do it.
4 things i like to apply to my basslines
1. Your going to need a sub bass side chain compressed against the kick
2. A tight and clean dry bass covering mids and bit of highs
3. A phat wet synth of delays and reverbs to cover the high ends this usually thickens the bassline
4. (optional) Something unique to make the bass sound different
And layer all the sounds together to get your amazing bass sound ... cheers and enjoy this tutorial from Krystaline Trance
MP3 Unsigned - The Best MP3 s from New and Unsigned Artists
you can click the link above to hear an example of what i have been talking about~