These two approaches to scales lead to specific sounds in a melody. The major scale is usually more cheerful or luminous, ... to all the colors, but he's not likely to use them all. He will choose ...

The Byzantine, also referred to as the double harmonic scale, has a formula of R-b2-3-4-5-b6-7 and makes for an interesting alternative to the major scale when soloing over major 7th chords.