Best known for his use of a high-pitched voice, a hallmark of the hip hop style dubbed "squeak rap", he has released singles with artists such as Danny Brown, Tyga, FKA Twigs, Tony Shhnow, BabyTron, Tommy Cash, Valee, and Dorian Electra.
[1] At age 11, he moved with his family to the Southern United States, living in Florida for about a year before settling in Smyrna, Georgia,[2] a city just outside of Atlanta.
The song garnered attention when its video was reposted by fellow New Yorker Lil Tecca, including from the music industry.
"[6] Though often suspected of being achieved artificially with tools such as pitch correction, 645AR has stated that his squeak is entirely natural[3] and even demonstrated it live in a video for Genius.
Graham said he "wouldn't imagine a musician would say that's the proper way of producing a falsetto", calling it innovative and saying 645AR is "testing the boundaries of what constitutes rap".
[9] Squeak rap is often described as a musical internet meme,[6] something which 645AR is noted as embracing, up to and including a video the artist made in which he jokingly claims that his voice originated from having been possessed by Mickey Mouse.
[20] Multiple artists have had their own use of falsetto compared to 645AR, such as Adam Levine,[21] Baby Keem,[22] FKA Twigs,[23] and Fousheé.