• Major Scale = R-2-3-4-5-6-7 Home base
• Major Pentatonic = R-2-3-5-6 Leave out the 4 & 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 Leave out the 2 & 6.
• Blues = R-b3-4-b5-5-b7 Minor pentatonic with the blue note b5 added.
• Harmonic Minor Scale = R-2-b3-4-5-b6-7 Natural minor with a natural 7.
• Melodic Minor Scale = R-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.
• Ionian same as the Major Scale.
• Lydian use the major scale and sharp the 4 - yes, it’s that simple.
• Mixolydian use the major scale and flat the 7. Change one note.....
• Aeolian same as the Natural Minor scale.
• Dorian use the Natural Minor scale and sharp the b6 back to a natural 6. Change one note.
• Phrygian use the Natural Minor scale and flat the 2. Again change one note.
• Locrian use the Natural Minor scale and flat the 2 and the 5. OK here you have to change two notes.
Modal Harmony - the rest of the story.
• If you play your modes over a chord progression you will probably only hear the tonal center of your progression.
• However, if you play your modes over a modal vamp the vamp will sustain the modal mood long enough for the modal mood to be heard. The modal vamp droning effect will sustain the modal mood. Where with a chord progression the chords change so quickly that the modal mood does not have time to develop. Modal vamps of one to two chords let the modal mood be heard. http://www.riddleworks.com/modalharm3.html
Scales and modes are for the melody - your solo. To solo let the melody be your guide. Yep, melody has to be in there some place. Counting on running a scale or a mode and letting that be your lead solo - good luck. The song's tune is the foundation for your solo or your improvisation of that tune. Let the melody be your guide.
OK easy said, hard to do. As the melody and the chord line to harmonize must share some of the same notes at the same time in the song -- and as the songwriter has already taken all that into account - inserting the harmonizing chord where needed - it makes since to play the chord's pentatonic scale over the chord - as that scale will have three chord tones and two safe passing notes in it's makeup. Play the chord's pentatonic scale notes over the chord changes as your melody solo right at first. Major chord - major pentatonic R-2-3-5-6 and minor chord - minor pentatonic R-b3-4-5-b7. Mix the notes up, no need to just run them in scale order. Think generic licks made from pentatonic notes and move those licks around with the chord changes.
Hal Galper's Master Class - Musical Vocabulary - YouTube R-3-5-3-6 8-5-R or 3-5-8-8-6-5-3-R. Make up some that sound good to you. Twenty licks used a hundred ways......