In 1975, during the recording, one of the violinists turned one of their headphones around so it faced away from their head. At a certain pitch, the head phone fed back and created a small “tweet”. It wasn’t noticed till weeks later when the records were pressed and the recording studio was bankrupt. In 2022 the song was successfully remastered to eliminate the “tweet”.
The song was released but the artist is now 79 just trying to get the song out there to be enjoyed.