Yoso is a progressive rock/soft rock supergroup combining former members of Yes (former members Billy Sherwood—bass/vocals and Tony Kaye—keyboards) and Toto (Bobby Kimball—vocals). It is a spin-off from the group CIRCA:. The band grew out of a plan for Kimball and CIRCA: (consisting of Sherwood, Kaye, guitarist Jimmy Haun and drummer Jay Schellen) to play together on an Italian tour in early 2009.

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