Sylvain - The Groove Master - listed his book, might give that a try for groove.
For what to put in a bass line, I'd recommend Ed Friedland's Building Walking Bass Lines.
Amazon.com: Building Walking Bass Lines (9780793542048): Ed Friedland: Books Ed is also a member here and drops in from time to time.
For Scales I'd send you to a piano book. Alfred's # 1, 2 & 3.
Amazon.com: Alfred's Essentials of Music Theory Complete (Books 1-3) (9780882848976): Andrew Surmani, Karen Farnum Surmani, Morton Manus: Books Covers how to read standard notation - IMO gotta identify the note first - then find it on your bass fretboard. Alfred's will get into what scales are and how they are formed plus talk about how they are the beginning of everything we do. Now how to get them into your bass, that's another story. IMO scales are for your lead solo and in Country that is handled by the lead electric or the pedal steel. So I'm not going to be a lot of help there. I use things made from the scales, i.e. chord tones and the pentatonic scales for my bass lines. But that is another story.
Finding scale charts is sometime hit and miss. If someone says; "That is based upon the E major scale" it would help if you start with the correct notes
that are in the E major scale. Here is a gift.
Major Scale Chart
C D E F G A B...............Notice the C scale has no Sharps
G A B C D E F#.............and the G scale has one, the F#
D E F# G A B C#...........and the D scale keeps the F# and
A B C# D E F# G#.........adds the C#. Then the A scale keeps
E F# G# A B C# D#.......everything and adds the G#. See how
B C# D# E F# G# A#.....it builds on it's self.
F# G# A# B C# D# E#
C# D# E# F# G# A# B#
F G A Bb C D E.............Look what happens with the flat scales
Bb C D Eb F G A...........F has one the Bb, then the Bb scale keeps
Eb F G Ab Bb C D.........it's self and adds the the Eb. Same thing
Ab Bb C Db Eb F G.......the sharp scales did...
Db Eb F Gb Ab Bb C
Gb Ab Bb Cb Db Eb F
Cb Db Eb Fb Gb Ab Bb
Memory pegs:
See God Destroy All Earth By F#irey C#haos. Order of the scales with sharps.
Fat cats go down alleys eating birds. Order of the sharps.
Farmer brown eats apple dumplings greasily cooked. Order of the scales with flats.
The key signature is showing three sharps. What scale has three sharps? C has none, G has one, D has two, A has three. Which sharps? Fat = F#, Cat = C# and Go = G# so the A major scale has three sharps, F#, C# and G#.
Natural Minor Scale Chart
A B C D E F G ................Notice how the 6th column of the
E F# G A B C D................Major scale becomes the 1st column
B C# D E F# G A..............in the minor scale and how the 7th
F# G# A B C# D E............column of the Major scale is now the
C# D# E F# G# A B..........2nd column in the minor scale. And
G# A# B C# D# E F#........yep, the 1st column in the Major scale
D# E# F# G# A# B C#......is now the 3rd column, etc. etc.
A# B# C# D# E# F# G#....Ask your self why? Hint, think relative minor.
D E F G A Bb C
G A Bb C D Eb F
C D Eb F G Ab Bb
F G Ab Bb C Db Eb
Bb C Db Eb F Gb Ab
Eb F Gb Ab Bb Cb Db
Ab Bb Cb Db Eb Fb Gb
Major Scale Box for your bass.
G|---2---|-------|---3---|---4---| 1st string
D|---6---|-------|---7---|---8---|
A|---3---|---4---|-------|---5---|
E|-------|---R---|-------|---2---|4th string
How to use those scales - If you can count to 8 and remember some of the following sequences your road to scales, chords and grooves will be shorter and perhaps smoother.
Basic Chords
Major Triad = R-3-5
Minor Triad = R-b3-5
Diminished Chord = R-b3-b5
7th Chords
Maj7 = R-3-5-7
Minor 7 = R-b3-5-b7
Dominant 7 = R-3-5-b7
½ diminished = R-b3-b5-b7
Full diminished = R-b3-b5-bb7
Scales
Major Scale = R-2-3-4-5-6-7
Major Pentatonic = R-2-3-5-6 Major scale without the 4 & 7
Major Bebop = R-2-3-4-5-b6-6-7 Major scale with a b6 added
Major Dominant Bebop = R-2-3-4-5-6-b7-7 Major scale with both b7 and 7
Natural Minor Scale = R-2-b3-4-5-b6-b7 Major scale with the 3, 6 & 7 flatted
Minor Pentatonic = R-b3-4-5-b7 Natural minor scale without the 2 & 6
Blues = R-b3-4-b5-5-b7 Minor pentatonic with the b5 blue note added
Harmonic Minor Scale = R-2-b3-4-5-b6-7 Natural minor scale with a natural 7
Melodic Minor Scale = R-2-b3-4-5-6-7 Major scale with a b3
Minor Bebop = R-2-b3-3-4-5-6-b7 Dorian with a natural 3 added
That’s enough to get you going.
Generic Notes for your bass lines.
The root, five and eight are generic and fit most any chord. Remember the diminished has a flatted 5.
The 3 is generic to all major chords. See a major chord R-3-5-8 is a generic bass line that will work.
The b3 is generic to all minor chords. See a minor chord R-b3-5-8 is a generic bass line that will work.
The 7 is generic to all maj7 chords. R-3-5-7.
The b7 is generic to all dominant seventh and minor seventh chords. R-3-5-b7 or R-b3-5-b7.
The 6 is neutral and adds color, help yourself to 6’s. I like R-3-5-6 for major chords. Has a great sound.
The 2 and 4 make good passing notes. Don’t linger on them or stop on them, keep them passing.
In making your bass line help yourself to those notes, just use them correctly.
Remember roots, fives, eights and the correct 3 will play a lot of bass.
Which chords like to go to what other chords, i.e. how a progression works (and thinks). For example:
C major scale has these notes; C, D, E, F, G, A, B and these chords; C, Dm, Em, F, G, Am, Bdim. and we identify them this way:
I,... ii,.. iii, .IV, V, vi,. viidim
C, Dm, Em, F,. G, Am, Bdim
- I tonic chord is the tonal center of the progression, you should end with the tonic, it brings everything back to rest. Now the tonic can go any where it wants to in a progression, just remember when you go to the I tonic you have released all the tension you have built up. Is that what you want?
- ii chord is a minor sub dominant chord, that wants to go to the dominant chord. Dominant chords are the V and the viidim.
- iii chord is a minor chord. It likes to drag the vi with it. The iii is a good lead to chord. Lead to what? How about a turn-a-round iii-vi-ii-V7-I.
- IV chord is a sub dominant chord like the ii. The ii and the IV both being sub dominant chords can substitute for each other. Their task in life is to move to a dominant chord.
- V chord is a dominant chord. Dominant chords want to get to the I tonic chord. The V7 is the climax chord and wants to move to the tonic RIGHT NOW.
- vi chord is minor. The relative minor in fact. it's task is to move to a sub dominant chord.
- viidim chord is the diminished chord and it is also a dominant chord. However, the viidim chord does not necessarily have to move to the I tonic immediately. The viidim likes to get to the tonic I, but, can take a more leisurely route, as in a turn-a-round. Use the viidim when you want to lead somewhere. viidim-iii-vi-ii-V7-I.
Have fun with this, you may want to print it and keep it as reference material. Kinda hard to find all of this on one sheet of paper. Now how to use all this, in your music, that's the real story.
Good luck and have fun.