DJ Dopler remix in Demerara

I work at a college. I commute to work on a bike. This morning I was negotiating a bus driver for the local Catholic school learning a new route through the 500 year old village we live in. The bells at Flagler college are pre recorded singing bells. This morning I heard the bells playing a Beatles song. It was "Yesterday". The recording sounded stretched or maybe it was a doppler effect of me riding across the college grounds.