"Frequency" (previously titled "The Frequency")^[1] is a song recorded by American rapper Kid Cudi. It was released on September 30, 2016, as the first single from his sixth studio album, Passion, Pain & Demon Slayin' (2016). The song was written and produced by Mike Dean, Plain Pat and Kid Cudi.^[1]

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"Frequency" originally premiered on Cudi's SoundCloud account on March 25, 2016,^[2] but was released for digital download on September 30, 2016.^[3] It is the first offering from his sixth studio album, Passion, Pain & Demon Slayin', which was released on December 16, 2016.^[4] "Frequency" runs for a duration of four minutes and fifty-eight seconds.^[3] It was described as "a low-key hip-hop ballad" by Rolling Stone reviewer Elias Leight.^[5]

Ryan Middleton of Music Times gave the song a positive review, saying "it has the spacey, stoner sound that fans loved from the Cudi on his first couple of albums".^[6] Fuse's Tyler Lauletta wrote that "the song is a return to form for Cudi, with shout-outs to women and psychedelic drugs in his signature sultry tone".^[7] Chico from Respect. wrote that Cudi "hums, sings and even lyrically dances all over this one, like we always knew he could".^[8] C. Vernon Coleman II of XXL wrote; "The dreamy production is highlighted by odd sound effects and spaced out chords".^[9]

The music video for the song, directed by Cudi himself, premiered on October 12, 2016, via his Vevo channel. The five-minute video features Cudi performing the song shirtless in a dark jungle.^[10] It also shows him having a threesome in a mushroom cave.^[10] Peter A. Berry of XXL wrote that the video is "simultaneously dark and colorful, much like the music Cudi’s provided for fans over the last eight years".^[11] The Boombox's Jacinta Howard called the video "dark and artistic", while Rap-Up called it "dark and smoky".^[12][13] Elisabeth Brier from Uproxx wrote; "It’s a sort of R-rated Wonderland. That’s perhaps the best way to describe the world depicted in Kid Cudi‘s new music video for "Frequency"."^[14] Pigeons & Planes named it as one of the best music videos released in October 2016.^[15]