This scene takes place after Juliet has been found dead. The answer is that they feel it is too sad a day to play any music.
Do u have any answer choices i will answer in the comments
<span />
<span> Cluvius, a man with a monstrous voice, who should bawl out his titles; and a thousand trained youths who had learned to applaud in unison whenever their master sang or played in public. So deftly had they been taught that each had his own rôle to play. Some did no more than give forth a low deep hum of speechless appreciation. Some clapped with enthusiasm. Some, rising from approbation into absolute frenzy, shrieked, stamped, and beat sticks upon the benches. Some—and they were the most effective—had learned from an Alexandria copy
</span>