When the COVID-19 pandemic forced musical activities to shut down in March 2020, singers searched for ways to stay connected and sing live music together. Online solutions such as Zoom helped groups socially, but did not allow a choir to rehearse and perform together. Several tech-savvy musicians turned to old-school audio technology to organize parking lot choirs, with each singer safely isolated in their own car. The idea spread through social media across the US and Canada, and reached the at...