I have not fully been through the Bass for Dummies book but I have looked through it. Pfeiffer has some bass groove skeletons in there that you would play over a certain chord.
Im just making this up but lets say you see a chord post like this.
LH/RH
C/EGBbC
When you look at this post in the LH you will see that the root bass note is C. So you know that C is the simple bass note to play with no technique.
When I look at the RH I try to figure out the chord. I know that this is a C7 inverted.
There are differnet ways you can look at this. You can see it all together and pick out the notes to find the chord. Because the LH is the normal bass line you know that is the root of the chord. So I see it as this
CEGBbC
C is the root so now I have to figure out where do the rest of the notes fit in. This is pretty much set up in root position of the C7 chord you would see in a piano chord book.
C7 = CEGBb
Because I now know that this is a C7 chord I can make a bass groove over it. So I could play
Bass
C,G,Bb,C
when the keyboard player is playing C/EGBbC.
(commas are single notes)
midi-
http://media.learngospelmusic.com/albums/lgm/users/mysteryman/bass/Bs15b78.midIf I was to post this for a keyboard player to do it all he/she would play.
LH/RH
C,G,Bb,C/EGBbC
Another thing you can do is play the broken chord as a bassline arpeggio. You know that the keyboard player is playing a C7 chord. So you can play:
Bass
C,E,G,Bb or C,E,G,Bb,C
If the keyboard play wants to play it all by him/herself they would play:
LH/RH
C,E,G,Bb/EGBbC
or
C,E,G,Bb,C/EGBbC
You can think of it in reverse to. When I play C,G,Bb,C the keyboard player can play a C7 chord.
If you know your modes you know that the mixolydian scale is played over a dominant 7 chord you you could play a C mixolydian mode when the keyboard player plays a C7 chord.
Bass/RH
C,D,E,F,G,A,Bb,C/EGBbC..................(Cmixolydian/C7)
I can post some more later