What is the expression tanbou balan? How can i use it?

Did you mean tanbou batan which means first notice, first call
literally means ...at the first beat of the drum....
at the first call,
at first warning,

egzanp:
Nou p ap pèdi tan, n ap koumanse nan gran maten. Tanbou batan fòk tout moun gen tan la, prèt pou mete men nan travay la.

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