The musicians are divided in two equal groups of two to several dozen people each. The two groups face each other on stage.

Optional: each group may wear distinctive costumes or make-up.

The conductor – like a judge and great Master – shall stand in the middle, with his/her back to the audience.

The movements follow one another without a break.

Ali sounds should be full and homogenous. Performers shall practice individually and collective/y to develop and improve such specific sound ...