Which singer produced The Downward Spiral?
The Downward Spiral:  "The Downward Spiral" features elements of industrial rock, techno and heavy metal music, in contrast to the band's synthpop-influenced debut album "Pretty Hate Machine" (1989), and was produced by Nine Inch Nails frontman Trent Reznor and Flood. Trent Reznor: Michael Trent Reznor (born May 17, 1965) is an American singer, songwriter, musician, record producer, and film score composer.
i don't know