Tonic Sol-fa's 3 irreplaceable voices. Together with the classic attitude of a big band. Tonic Sol-fa is a ground-breaking a cappella ensemble from Minnesota, in constant development since their formation two decades ago. TSF stands as one of the leading forces in the world of vocal music with Emmy Award winning arrangements and multi-million selling compositions. The Shaun Johnson Big Band Experience is the only group taking big band music, fusing it with modern day mixes of all genres, and making the act of giving "cool." Suits. Edge. Colorful socks. Contemporary songs with big band punch.