Years before Baby Voice Carti fully arrived, he gave us a glimpse at the unique style in 2016. Playboi Carti's biggest contribution to ASAP Mob's Cozy Tapes Vol. 1 came on "Telephone Calls," and he used the opportunity to experiment with a small first step to the full-blown baby voice. One staple of Baby Voice Carti is its higher pitch, and another is its slurred pronunciation of lyrics, so we can point to his chorus on this single as a checkpoint. Carti's voice is slightly high-pitched and slightly slurred. Before you walk, you have to crawl, and a very early form of Baby Voice Carti is crawling all over "Telephone Calls."