I do not think anyone mentioned "The Box", so here is a cut and paste that may be if interest.
Might as well give you some more. Fearceol mentioned chord tones. Yes that is what we play 95% of the time. Here is another cut and paste paper for your reference file.
My old standby chart of generic bass lines using the major scale box as a Rosetta stone.
Bass Patterns based upon the Major Scale box.
Major Scale Box.
...Index...Middle..Ring....Little
G~~|---2---|-------|---3---|---4---| 1st string
D~~|---6---|-------|---7---|---8---|
A~~|---3---|---4---|-------|---5---|
E~~|-------|-R/1---|-------|---2---|4th string
You may recognize this pattern with dots.
Adding the numbers lets the pattern come alive.
Cmaj7 chord coming up in the song. Find a C note on the 3rd or 4th string and put this box's R over that C note. Then play the "spelling" for the Cmaj7 chord. That spelling is listed below and it is R-3-5-7. If you wanted to play the C major scale, that spelling is 1-2-3-4-5-6-7.
Basic Chord Spellings
- Major Triad = R-3-5 for the C chord.
- Minor Triad = R-b3-5 for the Cm chord.
- Diminished Chord = R-b3-b5 for the Cdim chord.
7th Chord Spellings
- Maj7 = R-3-5-7 for the Cmaj7 chord.
- Minor 7 = R-b3-5-b7 for the Cm7 chord.
- Dominant 7 = R-3-5-b7 for the C7 chord.
- ½ diminished = R-b3-b5-b7 for the Cm7b5 chord.
- Full diminished = R-b3-b5-bb7 for the C with the little o - no strike through.
See a chord and play it's chord tones. As every key will have three major, three minor and one diminished chord it's a good idea to get your major, minor and diminished bass line chord tones into muscle memory so when you see a chord your fingers just know what will work. Now the song may only give you enough room for the root, or root five - adapt and get as many chord tones into your bass line as needed. Root on 1 and a steady groove from the other chord tones plus something to call attention to the chord change is what we do.
Scale Spellings Yep, gotta do our scales so our fingers know where the notes are and our ears get used to the good and bad sounds. Scales are a right of passage thing. Got to know them, however, chord tones is what we get paid to play.
- Major Scale = 1-2-3-4-5-6-7 Home base
- Major Pentatonic = 1-2-3-5-6 Leave out the 4 & 7
- Natural Minor Scale = 1-2-b3-4-5-b6-b7 Major scale with the 3, 6 & 7 flatted.
- Minor Pentatonic = 1-b3-4-5-b7 Leave out the 2 & 6.
- Blues = 1-b3-4-b5-5-b7 Minor pentatonic with the blue note b5 added.
- Harmonic Minor Scale = 1-2-b3-4-5-b6-7 Natural minor with a natural 7.
- Melodic Minor Scale = 1-2-b3-4-5-6-7 Major scale with a b3.
Let the major scale be your home base then change a few notes and you have something different. No need to memorize a zillion patterns. Let the major scale pattern be your go to pattern - then adapt/adjust from there.
Generic Notes - for your bass line.
- The root, five and eight are generic (R-5-8-5) and fit most any chord. Remember the diminished has a flatted 5.
- The 3 is generic to all major chords. So R-3-5-3 will fit under any major chord.
- The b3 is generic to all minor chords. And R-b3-5-8 will fit under any minor chord. Why the 8? Well the 8 is just another root in the next octave.
- The 7 is generic to all maj7 chords. Yep, R-3-5-7 fits nicely.
- The b7 is generic to all dominant seventh and minor seventh chords. G7 = R-3-5-b7 or Gm7 = R-b3-5-b7.
- The 6 is neutral and adds color, help yourself to 6’s. Love the sound of R-3-5-6 with a major chord.
- 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.
- Roots, fives, eights and the correct 3 & 7 will play a lot of bass.
OK fine, how to use all that I know is the question. How about some generic riffs and or grooves:
Google can find hundreds of riffs for you; get several into muscle memory. Here are some
|6667 8555 5668
|5538 6333 3378
| and the ole R-5-8-5 will fit most anywhere.
Happy trails.