Ever heard of a squealing rapper? Meet 645AR, the Bronx-born, Atlanta-raised artist who’s pushing the vocal boundaries of rap with his high-pitched voice. With an early cosign from Frank Ocean and a new single ("Sum Bout U") with equally eccentric pop star FKA twigs, 645AR is bringing his cartoon trap sound to the masses.

For Fine Tuned, 645AR squeaks his way through his breakthrough viral hit “4 Da Trap” with live piano courtesy of Matt Composure.

For more 645AR, follow the artist's verified account on Audiomack.

Watch our episode of Bubbling with 645AR.

For more Fine Tuned with Audiomack, including recent performances from YNW Melly, Lil Durk, Rod Wave, Calboy, YK Osiris, Stunna 4 Vegas, PnB Rock, Flipp Dinero, OMB Peezy, Mr Eazi, Akon, Jack Harlow, Kevin Gates, Yungeen Ace, NLE Choppa, Davido, Kaash Paige, Jay Wheeler, YNW BSlime, Flo Milli, Xavier Omär, Moneybagg Yo, Cousin Stizz, Lil Zay Osama, TLE Cinco, Yella Beezy, A Boogie Wit da Hoodie, Phony Ppl, G Herbo, J.I, SahBabii, K Camp, and YFN Lucci, subscribe to Audiomack’s YouTube channel.

Watch 645AR Perform "4 Da Trap" for Fine Tuned