When jazz guitarists improvise what scales/modes do they use?
The major scale is the most used scale. In jazz you see a lot of 2-5-1’s. An example is Ami7 – D9 – G Maj7, This is all in the G major scale. In Jazz most songs will change keys and in so they will change what scale they are playing. We use a diminished scale and many different approaches to soloing. We use the Jazz Minor aka Melodic Minor. It would take a long time to explain all the different approaches. Learn the chords of the song and play arpeggios with lines around the arpeggio. In the video link he plays a lot of arpeggios.
