Experts and choir singers have both been extolling the physical, emotional, and psychological benefits of singing together. Here's a discussion from CBC Radio Canada on the actual science.
Studies continue to confirm how singing in a group impacts your body and your sense of well-being! Check out this article:
Recent studies have shown that singing, especially singing in harmony with others, is remarkably effective at combatting depression. Indeed, those studies suggest that singing in harmony combats a number of conditions, including Parkinson’s and high blood pressure. The body’s rewards for screwing up the courage to sing include an outpouring of endorphins (pain relief), dopamine (pleasure, alertness) and serotonin (euphoria, contentment), as well as a reduction in cortisol (signals level of stress).
The corollary benefits of singing in a group are more social. We are not alone; we are part of an organism greater than us, one that we can fold ourselves into. For a brief time, we can dispose of our natural selfishness and bathe in a happy, harmonious experience.
From: "After my divorce, singing lifted me out of depression” by Nelson Smith, November 2016 - The Globe and Mail
Here's our audio track of all the spring 2015 choirs edited together, singing The Traveller!
MPC-Traveller, AUDIO, All choirs, May 2015 (right click "save as")
My Pop Choir's Big Sing on CTV