Sentence:  A score of years ago those who cared at all for the dramatic element in opera, and the measure of whose delight was not filled up by the vocal <WSD>pyrotechny</WSD> which was the mainstay of the operas of the older répertoire, found in these music-dramas their chief solace and satisfaction. 
Meaning of the word marked with <WSD> tags:  Impressive, dazzling or virtuosic display.