 Radio stations like KJET, KGRG and KCMU and local music press like "Backlash" and "Seattle Rocket" and "City Heat Magazine" also played a vital role.Grunge's entrance into the mainstream is usually traced to the release of Nirvana's "Nevermind" in 1991, though others point to the signing of Soundgarden to A&M Records in 1988 and their Grammy-nominated "Ultramega OK", and the release of a compilation album called "Deep Six" on C/Z Records in 1986.Though Soundgarden failed to bring in large national audiences at the time, record executives saw enough promise to send scouts out to the major bands, many of whom signed to large labels.