WiFiGawd ’s one-producer collaboration albums seem like sparring sessions, the D.C. rapper bobbing and weaving in a post-regional gauntlet where distinct underground styles are thrown at him at a furious pace. It’s true of 2018’s Heat Check , where he fused with New Yorker Tony Seltzer’s swirling, downtempo creations that almost doubled as relaxation mantras; the same goes for his link-ups with Virginia-based artist GAWD, who manned the boards for the 2020 standout Hot As Hell and 2023’s Block Music . These albums are unique exercises for WiFi and his understated, malleable rapping—balancing acts for retaining his own singular style while melding with his producers’ beats. On WiFi’s latest project, SOULVINCI —his first full-length project with North Carolina producer Dylvinci—he passes another self-imposed test.…