It's often said that a bass player, besides the drummer, keeps the rhythm and the support for the entire band. I mean, when the bass player plays in sync with what's going on in the song it's wonderful. But when the bass player doesn't, it's awful. Ask me how I know, I've been there.
The difference usually boils down to whether or not the bass player has a good ear, that is, is ear trained in both perfect pitch and relative pitch.
It's way worth the effort for any bass player to acquire these skills for it will take his or her playing to a new level and enhance the experience of the entire band.
I highly recommend the following resources which have helped me when I played bass in a band:
The following are helpful resources as well:
I hope they help you as well and please let me know how and in what way these courses are helping you!
Vasili-