Eerie Christmas concert on world's loudest acoustic instrument

Shane Speal says:

Chasing Steam is a documentary about a strange Christmas concert in York PA, performed on a 100 year old factory steam whistle. The eerie, out-of-tune sounds project 134 decibels and can be heard up to 12 miles away. I trace the concert;s history from a musician's point of view, interviews the current performer… and in a DIY twist, builds a homemade version with musical instrument inventor, Ben "Gitty" Baker.

The documentary was filmed for York PA's community access station and is now available on Youtube. (Note: The link has the video starting at 13:54. This is intentional to bypass a featurette that precedes the documentary.)