What was Radiohead's sixth studio album that was influenced by alternative rock instrumentation with drum machines, synthesisers, and digital manipulation and featured the single "Go to Sleep"?
Go to Sleep: "Go to Sleep. Go to Sleep: , commonly referred to as "Go to Sleep", is a song by the English rock band Radiohead, released as the second single from their sixth studio album "Hail to the Thief" (2003) on 18 August 2003. Hail to the Thief:  Following "Kid A" (2000) and "Amnesiac" (2001), which incorporated jazz, classical and electronic music influences, "Hail to the Thief" combines alternative rock instrumentation with drum machines, synthesisers, and digital manipulation.
Hail to the Thief