After attempting to play "Roulette Dares" by the Mars Volta, I've been alerted to the fact that I'm stuck in a rut with my bass playing skills. If anyone knows this song or how to play it that would help, but here's what I'm struggling with: 1. Speed - some of the notes are faaasst. 2. Variation - the bassist plays so many variations that I'm struggling to remember them all. 3. Time signatures - there are a couple of changes that often throw me off. Can anyone recommend anything for me to do to build up my skills in these areas? I know it just takes a load of practice, but are there any specific methods/songs I could learn to speed the process up?! Any help appreciated. Thanks.