This is the 12383rd most frequent Russian word.
карильон
"Карильон" (carillon) is a musical instrument consisting of a set of bells played using a keyboard or automatic mechanism.
In this sentence, 'карильон' refers to the carillon instrument itself, introducing it as a concept.
Карильон — это музыкальный инструмент с множеством колоколов.
A carillon is a musical instrument with many bells.
Here, 'карильон' is used to describe the sound of the instrument being played publicly.
Вчера в парке звучал карильон, и его мелодии привлекли многих людей.
Yesterday in the park, the carillon was playing, and its melodies attracted many people.
In this instance, 'карильон' refers to the instrument as the intended medium for the new composition.