Like the Tango Argentino, Tangos Gitanos roots lie in the way African and Caribbean music blended with Spanish music in 18th and 19th century Latin America. Similar to it’s South American cousin, Tango Gitano consists of a simple, easily varied harmonic and melodic structure over a four-count rhythm. Unlike other four-count patterns, the first beat is weak while the other three beats are strong. As Tangos became a part of flamenco in the 19th century, certain aspects of older flamenco forms were folded into it, including 12-count soleares letras re-shaped to fit the four count rhythmic pattern. Tangos of Granada shows traces of Moorish Zambras, while the Tango de Cádiz, Tanguillos, is a compound rhythm of triplets and duplets.

https://www.youtube.com/watch?v=SMcDNvrNKD0