I just started to figure out alot of basslines by ear and am starting to suprise myself at how well I can actually figure them out! All I do is hum the bassline over and over again with the CD, then I turn it off and keep humming and then I find the notes on the bass one at a time! After I figure out the line, I play along with the song to get the groove down and to see if I'm missing anything. This method seems to be working for me quite well and has allowed me to learn more basslines in a week than I've learned in a couple of years using tab. But, sometimes I go online to look at the tabs and compare them to what I've figured out and I've found that almost all of the tabs I look at are totally different than what I hear on the recording. Some tabs I play seem to have "added" notes that I cannot hear at all on the CD and it makes me wonder whether or not my ear sucks, or are internet tabs unreliable???