I'm a very new bass player. I've been playing blues and rock. I just recently started jamming with my best friend in the whole world - he plays alto sax. We have had some fun doing blues stuff. He plays with another friend who plays keyboards and together they do a lot of blues and jazz. My buddy had me come with him and observe and they would like me to bring my bass and sit in and do what I can next time. He is more confident than I am in my abilities. The jazz stuff they do are originals. My friend tells me that its not really true hardcore jazz, but more blues based and jazzy music (it sounded like jazz to me) So for the blues stuff I did with the horn player I was playing mostly walking lines and I figure that will work for some of the jazz stuff. Beyond that I figure I will experiment with playing the roots and maybe try some major triad based lines. I am looking for any suggestions on what approach I might take to coming up with a line for this strange jazz music, or any web sites or books which might be helpful to me....also, my friend had me play him a walking 12 bar blues line in B flat to do his favorite blues tune (he was impressed, I guess most guitar and bass guys ask him if he could just do it in A or something)...anyway, I started on the 6th fret of the fourth string in standard tuning - but I've been thinking that sinse I play a five string next time I might detune a half step and play that line an octave down with open positions - or would that be to low for the the other guys to play with? - it's the same note so it should work fine (ok, I think it would maybe work better) any advise? Sorry if this post is too long or to vague. While I am interested in this and I am sure playing with these guys will teach me a lot and probably be a lot of fun - jazz frightens me. Hey, I'll make that my signature. Jazz frightens me.