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"unsquare" because...

...in a square dance the beats can be counted in fours with one dance step per beat. Brubeck's "unsquare" beats in this melody come in groups of seven. Count them as 1,2--1,2--1,2,3. The leaping part of the dance comes on the 1,2,3 part of the beat group and contrasts with what we're used to (fours) giving a very "unsqure" feel this delightful dance.

By the way Brubeck makes a similar departure from the customary four, six or eight beat grouping by going with five beats in his famous Take Five (paul Desmond wrote the melody).

The set designer in this video successfully creates the unsquare feel with the odd angles of the farm structure, but seems to have missed the idea of "seven;" I don't see a clear reference to the number in the set.

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Thank you Nazanin Khanom, me usually don't mention how much me appreciates  your selections, but you're all the way up there with Shirin khanom. Keep'em coming.

Below are two of my favourites from him, cheers

Or as David would have said: " Be there or be Triangular!"

//www.youtube.com/watch?v=2htbaJFEAXQ&feature...

//www.youtube.com/watch?v=faJE92phKzI&feature...