Bem, em ingles por cortesia aos restantes leitores:

Well, returning to the first message: fado and tradicional arab music, at least they both share the several time repetitions of the same frase in different tones, and the same kind of voice. They are in deed very similar, as result of 400 years of arab culture under bagdad califa and then cordoba califa.

Portuguese are a certainly a unique blend, celtic, romans, visigods, arabs, african, south american, indian and far east.

Abraços!
Peace upon you.