Tonic Sol-Fa

An acclaimed Minneapolis–Saint Paul a cappella quartet, Tonic Sol-Fa is known for their exuberant, harmonically rich blend of pop and jazz. Emerging in the 1990s, the group has toured and recorded regularly. They perform both originals and covers from across the decades, and have issued albums like 2015's Original and 2019's holiday-themed March of the Kings. Formed at Minnesota's Saint John's University, Tonic Sol-Fa is led by singer and founding member Shaun Johnson. The group initially formed in the mid-'90s and steadily gained a national following through touring and thei...