Or how about hemitonic scales (that is, scales with half steps)

F# G B C# D f# comes to mind as a pretty good one on the flute. Of a very different breed than your average "black key" pentatonic scale, with some rather abstract modal relationships.

Th predominance of M7 intervals between harmonic regions is indicative of great emphasis on melodic structures, rather than harmonies, as the latter prove to become easily tetrachordal and dissonant. This is evidenced in the music of Japan, where this scale is utilized often.

Hadn't seen this one described here, so I thought I would post it...

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