Sentence:  All these emotions were screwed up to new heights when , after acceptance and the first <WSD>rehearsals</WSD> , there ensued such a buzz of excitement among Parisian music lovers that Duclos had to come running to Rousseau to inform him that the news had reached the superintendent of the King 's amusements , and that he was now demanding that the work be offered first at the royal summer palace of Fontainebleau . 
Meaning of the word marked with <WSD> tags:  a practice session in preparation for a public performance (as of a play or speech or concert)