The vocal interplay between Chester Bennington and Mike Shinoda plays as a major part within Linkin Park's music, with Bennington being the lead vocalist and Shinoda as the rapping vocalist. On Linkin Park's third album, "Minutes to Midnight", Shinoda sings lead vocals on "In Between", "Hands Held High", and on the B-side "No Roads Left". On numerous songs from band's fourth album, "A Thousand Suns", such as the album's singles ("The Catalyst", "Burning in the Skies", "Iridescent"), both Shinoda and Bennington sing. The album has been regarded as a turning point in the band's musical career, having a stronger emphasis on electronica. James Montgomery, of MTV, compared the record to Radiohead's "Kid A", while Jordy Kasko of "Review, Rinse, Repeat" likened the album to both "Kid A" and Pink Floyd's landmark album "The Dark Side of the Moon". Shinoda stated that he and the other band members were deeply influenced by Chuck D and Public Enemy. He elaborated: "Public Enemy were very three-dimensional with their records because although they seemed political, there was a whole lot of other stuff going on in there too. It made me think how three-dimensional I wanted our record to be without imitating them of course, and show where we were at creatively". One of the record's political elements is its samples of notable speeches by American political figures. "A Thousand Suns" was described as trip hop, electronic rock, ambient, alternative rock, industrial rock, experimental rock, rap rock, and progressive rock.