For the fourth release in his acclaimed Mushroom Jazz series, DJ Mark Farina lets the urban dance and hip-hop roll while staying true to the downtempo, rainy-day-jazz mode that inspired the series title. Farina has left a trail of devoted jazz-house fans in his wake, from Chicago to San Francisco. Some might not follow the path he walks on this record, which even more than Jazz 3 finds inspiration in the DJ flava of rappers like Mr. Lif and Fat Jon. Others will appreciate the easy, smooth vibe of the record, not to mention Farina's always dependable taste in selections and contrasts. Benny Blanko's "Listen" empties into the funky din of Bernal Boogie's "Phone Tap" with nary a ripple, while tracks from Scienz of Life and People Under the Stairs hypnotize and pleasantly disorient the listener with a sweaty serenity. By cradling rougher styles in smooth trip textures, Farina successfully expands his palette and keeps the series crispy fresh. --Matthew Cooke