Mazzy Star is an American alternative rock band formed in Santa Monica, California, in 1989 from remnants of the group Opal. Founding member David Roback's friend Hope Sandoval became the group's vocalist when Kendra Smith left Opal. Mazzy Star is best known for the song "Fade into You" which brought the band some success in the mid-1990s and was the group's biggest mainstream hit, earning extensive exposure on MTV, VH1, and radio airplay. Roback and Sandoval are the creative center of the band, with Sandoval as lyricist and Roback as composer of the majority of the band's material.

In Mazzy Star, Roback plays guitar, keyboard, and piano. He wrote almost all music for Mazzy Star, and he has also produced all their recordings.  Roback grew up in Pacific Palisades, California, graduating from Palisades High School in 1975. He started a band called Rain Parade with his brother Steven. They first hit the scene in 1982 as part of a loose aggregate of psychedelic 1960s-influenced guitar bands in Los Angeles, and they were in the forefront of that movement which lasted a couple of years.  After Rain Parade's first album and tours, Roback left the band. He then became involved with ex-Dream Syndicate bassist Kendra Smith and formed a new band called Clay Allison in 1983. The recordings from the summer this year remained unreleased until the 1989 release of Opal Early Recordings.  After Clay Allison's 1984 tour, the band decided to go with a name change, and went from Clay Allison to Opal, whose sound was defined by Roback's spare, distorted guitar work and Smith's vocals. They released the Northern Line EP in 1985. SST Records signed Opal and released their album Happy Nightmare Baby on December 14, 1987. During the Opal tour in December 1987, Smith left the band. She was replaced by Sandoval, and they toured Europe through early 1988. Roback and Sandoval had an intimate relationship at this time and after Opal was disbanded, they took the remaining members of Opal and changed their name to Mazzy Star.  Roback currently resides in London, although he spent most of the past decade living in Norway.

Answer the following question by taking a quote from the article: Who did David Roback partner with for Massy Star?
Kendra Smith