It may sound like nonsense, but DJ NaNa’s handle is a popular nickname in his parent’s homeland of Ghana, and the world inside his Canadian head is an excitingly confusing mess of American freestyle and scratch culture, ’90s European sample culture, and modern digital post-border sonic vagabondism. NaNa’s diverse influences come together on “Wheel Life Is,” blending together Kanye-style chipmunk soul samples, string rhythms, and scratches, and a molasses-slow break out of the chopped-and-screwed playbook. The World Inside My Head, Vol. 2 balances mostly instrumental tracks with selected guest MCs, peaking on “Untitled,” a Jay Dee-ish showcase for fierce verses from Turbin and Planet Asia.