For many people in York, it’s not officially Christmas until they hear the sounds of the York Factory Whistle.
Christmas carols played with the steam whistle have been a holiday tradition since 1955.
Donald E. Ryan, the current whistle master, took over the role after his father passed.
Ryan uses a handmade measuring stick to hit the notes. His assistant holds the whistle valve open while crews outside use a generator to produce enough air for a 20-minute concert that can he heard up to 10 miles away.
“This is not for people that have perfect-pitch ears because this is not a musical instrument,” Ryan said.
The whistle broke the world record for being the loudest music without amplification from a nonmusical instrument.
The annual Christmas Eve concert begins at midnight.