A Certain Ratio is a British band formed in 1977 in Manchester. They are known for their unique blend of post-punk, funk, and dance music, which helped shape the sound of the Manchester music scene. The band was associated with the influential record label Factory Records and gained recognition for their energetic live performances. The group's lineup has changed over the years, but key members include Martin Moscrop, Simon Topping, and Jeremy Kerr. A Certain Ratio has released several albums, with notable works like "To Each" and "Sextet." Their music often features a mix of instruments, including brass and percussion, creating a distinctive sound.