He's 50 now, and the years show in his face and his numb, frostbitten fingers. But when he sits down to play a second-hand piano in a Vancouver thrift shop, all that goes away.
"It's a joy that surpasses all understanding," local resident James Maynard told CNN affiliate KATU.
Maynard sits and listens in Second Hand Solutions, the second-hand shop where Welsh plays.
Welsh has never had a lesson, and doesn't read music. "I don't know how to play music, but I like what I hear in my head," he told KATU.
In this video, Welsh plays a composition called "Aerial Aquatas," which he refers to as "my 'Amazing Grace.' "