Sour Soul is a collaborative studio album from Canadian jazz instrumental hip hop band BadBadNotGood and Wu-Tang Clan member Ghostface Killah. It was released worldwide on February 24, 2015.

BadBadNotGood is a Canadian instrumental band and production team from Toronto, Canada. The group was founded in 2010 by bassist Chester Hansen, keyboardist Matthew Tavares, and drummer Alexander Sowinski. In 2016, they were joined by frequent collaborator Leland Whitty. Among other projects, the group has released five solo studio albums, with the latest, Talk Memory, released in October 2021. They have had critical and crossover success, finding audiences in the hip hop, jazz, and alternative music communities.