Seth Firkins, best known for his work as Future’s personal engineer, passed away Saturday (Sept. 23).

The beloved engineer has worked with some of the most notable acts in the Atlanta hip-hop scene today, with a roster of clients including the likes of Young Thug, Zoey Dollaz, Young Scooter and more.

While more details surrounding his death have yet to emerge, with some claiming he suffered from a heart attack, hip-hop has taken to social media to react to the sad news, with many expressing their condolences regarding the passing of the Kentucky native.

“I always gave racism a cold shoulder because my real brother Is a white guy by the name of Seth Firkins,” Future posted on his Instagram, reflecting on the tragic news. “I got a call saying u died in your sleep? First thing came to my mind is, why are you sleep at 5am? That’s when we record our best s–t & I tell u ‘don’t’ fall asleep we got more work to do.. but somethin told me I should’ve been at home recording for some reason. I was saying this in my head, then bad news beat me home! I love u beyond this post, I will cherish u forever big bro, I just wish u would’ve text me & told me u was going to sleep and i wasn’t going to be able to wake u up this time…the family will miss u 1000%!! No kap in my game kid, rest well my brother. Rest well.”

Our thoughts and prayers go out to Firkins’ loved ones during this difficult time. See the heartfelt messages some of his friends and frequent collaborators have shared thus far in the posts below.