Hey everyone. I am really having a great time reading and gathering all the information here on talkbass ... It only makes me want to go practice more and more! .When I used to play with people(as the drummer) the others would say stuff like 'i'm playing in C.' or 'I am going C, D, G ...' I assume that this is the root(??) of what it being played, and in turn corresponds to the note they are stating. However, as a new bassist if a guitarist says 'in C' what is expected from the bass? Do I come up with a line that progresses through a C scale and back again?? Thanks a lot - K.