Apparently discoveries in the past few decades indicate that the people who built Giza pyramids were not actually workersslaves.

Lehner’s excavation of the worker’s village paints a clear picture of the pyramid laborers, highlighting a higher quality of life than previously believed. The workers had access to high quality food, were given proper burials, and lived under an organized labor system, where workers contributed to various societal and construction functions of their own free will. This archaeological evidence directly opposes previous beliefs that the pyramids were the result of intensive slave labor. This misconception began with Greek Historian Herodotus, and was later popularized in pop cultural depictions of the building of the pyramids.[16]

https://en.wikipedia.org/wiki/Giza_pyramid_complex

But yeah, I’d have a hard time believing there was no music or singing involved building those.