Check out Todd Johnson's Module System for learning walking bass lines. http://www.toddjohnsonmusic.com/home.html As an old newbie, I am always looking for resources on learning bass lines. Last week, I was in Southern California on a business trip. I went to a jazz club in Fullerton called Steamers because the band playing was led by the guitarist Ron Eschete. He has played and recorded with Ray Brown and Gene Harris among others. His bassist was Todd Johnson who plays a 6-string electric bass. I was disappointed that he wasn't playing a DB, but his playing style was tremendous. I was sitting next to a student of his who introduced us before the first set and we started talking about my wanting to learn bass lines. His advice was very helpful. One of his recording projects was a CD with Kristen Korb playing DB and singing while he plays the 6-string and Kendall Kay plays drums. It is a very good record and since I like Kristen as a bassist and vocalist, it is a bonus. He has a DVD explaining his simplified method of learning how to contruct walking bass lines. At his website, he has a page with two free lessons on PDFs. It is a great approach to teaching bass line construction.