496. HOW TO IMPROVISE SIMPLISTIC COUNTER MELODIES (INCLUDING BASS LINES) BEING IN THE 12 NOTES CHROMATIC SCALE , OVER ANY SONG, WITHOUT KNOWING THE SCALE OR THE CHORD-PROGRESSION.

The idea is that behind any harmonization of a melody, by a chord progression in a scale and mode of it, there is an alternative harmonization with only 3 (1,4,5), only 2 (1,2 or 4,5) or only one chord (1) but which must be neither major nor minor but a neutral power chord (tonal-dominant-tonal or 1-5-8)

This harmonization is out of the usual style of guitar playing, but still it exists in arrangements where bass, or continuous bass, is engaged.

So the way to find this continuous bass isokratic (drone) line of only a few notes (at most 3-4 notes) continuous or drone bass is to use notes only at the 1st octave of the piano, as if whole chords, and fit it to the melody, changing it by intervals to the 2nd (rarely 3rds) to find the other note.

Usually the odd-numbered notes of the mode will give the first note, and all the even-numbered notes of the mode will give the second note. The changes will be when the melody uses more of the odd-numbered notes or more of the even-numbered notes. 

It is obvious that if the player knows the usual chord progression, then he will simply play one note from each chord as the chords changes to produce a countermelody or bass line. This would be a method of giving many more notes and changes compared to the previous. It will also sound better fitting, but what it takes is that the chord progression must be known. 

495. ISOKRATIC (DRONE) PAIRS OF NOTES 4-5 THAT DIFFER BY A TONE , MODES, HARMONIC TRIADS OF CHORDS SUBSTITUTIONS AND EVEN-ODD NOTES CHORDS-ARPEGGIOS

 Each harmonic triad defines this pair.

E.g, the 3M7-6m-2m harmonic triad defines the 3-2 isokratics  (or ancient power chords 3P-2P, where the 6m is usually substituted by 3P) , or the even-odds chord arpeggios. 3-5#-7-2=3M7 and 2-4-6-1 =2m7 . 

https://www.youtube.com/watch?v=kuCGvw-N_BA

The idea, of course, behind the pair of isokratic notes differing by an interval of a 2nd in a mode of a scale is that any melody on a mode of a scale can be harmonized with 2 chords: the odd notes chord corresponding to the note number 5 and the even notes chord corresponding to the note 4.

When in a song, which is in a scale and mode, of notes, numbered 1,2,3,4,5,6,7, the isocratic notes are 4-5, then, the bass line, is the notes 2-4-6-1 as long as isocratic note 4 lasts and 1-3-5-7 as long as isocratic note 5 lasts. The isokratic notes are also ancient power chords (neither major neithe minor, made from interval of 8th and 5th like C-C'-G')
This bass method, in a 1,2,3,4,5,6,7 mode-scale, is based on the musical theorem, in harmony, that every melody in such a mode can be harmonized with two single 4-chord chords, 1-3-5-7 and 2-4-6-1. So the bass lines are arpeggios on these two four-chord chords. We always talk about diatonic modes or modes in melodic or harmonic minor.

494. HOW TO UNLOCK THE IMPROVISATION OF BASS-LINES WITH THE ISOKRATIC (DRONES)TRINITY OF TONAL, SUBDOMINANT AND DOMINANT NOTES 1-4-5.

 The idea, of course, behind the pair of isokratic notes differing by an interval of a 2nd in a mode of a scale is that any melody on a mode of a scale can be harmonized with 2 chords: the odd notes chord corresponding to the note numbers 5 or 1 and the even notes chord corresponding to the note 4.