The modes are a system of seven scales dating back to Pythagoras of Ancient Greece. The scales are named: Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian and Locrian.
Though many music schools teach the modes as versions of the C major scale, it is perhaps the worst possible way to teach them. This explanation is valid historically but is relatively useless for jazz guitar applications.
Chuck records Flight from the "Freefall" CD
Each mode is characterized by a specific whole – half step scale pattern, a characteristic scale step and three primary triads. By focusing in on the scale tones while emphasizing the characteristic scale step melodically and the primary chords harmonically, you can get an authentic modal sound. Jazz makes particularly good use of modality. Early jazz use of modality would be Miles Davis and his work on Milestones, So What etc
