JEFF PARKER - The Relatives LPIf you went looking for a poster child for Chicago's multidirectional, cross pollinating, interstylistic music scene, you couldn't find a better one than Jeff Parker. Parker: jazz guitarist with pro credentials, widely travelled and prized by top soul jazzers and hard boppers. Parker: inveterate rocker who revitalized Tortoise with his ferocious improvising and tasty licks. Parker: experimentalist willing to try new dub, hip hop, electronic, collage,