Im in a new project with a few written songs. its all very simple straight forward four four timed music nothing crazy. but im have a very hard time writing simple bass lines or music. my background is in jazz metal grindcore ect. and everytime i sit to write music i come up with some simple stuff but i cant hear the rest of it. it all sounds so boring when im playing a very simple bass line without a guitarist or drummer that i end up adding to it and adding to it that it becomes unrecognizable and overtly complicated. any advice?