The isle is full of noises

I awoke at 6.30 one morning to the sound of aliens. It was still dark when i went outside to find them. And didn’t. It lasted over an hour and was starting to freak me out a bit. Later in the day i found out that the local theremin artist had been serenading the neighbourhood from the high grassy knoll behind our house. He was to do so the following morning too but too many people complained about the “noise”. Killjoys.