Hey,
Whenever I write a song, I tend to write the guitar music first, (comes easier and helps me while writing) and then I'll write the bass in later.
Usually, the guitar would just be playing chords with the odd solo, so it was quite easy to write the bass in. I was extremely lazy most of the time, and if the guitar was playing an A chord, I would just have the bass play an A chord, (occasionaly I would write a long complicated bass line, but not very often)
However, recently, for some unknown reason, I've stepped my game up a bit with the guitar. Now a lot of my songs have numerous sections in different keys etc.
So my question is, is there a guideline to writing bass over guitar? Do the notes have to match? Is there any note that won't go with another note etc.
Sorry if it's a stupid question, I know I tend to have a lot of those, but I don't have many other people to ask and I trust the information I get here.
Thanks in advance.