Yasiin Bey might be back and The Alchemist is the accomplice. Yasiin Bey, the artist formerly known as Mos Def, is making his long-awaited return to music with a new album titled Forensics ...

Alchemist excels at pinpointing the most unnerving parts of a song—a minor-key piano modulation here, a restless drum fill there—and looping them to intensify their unease: Consider the ...