Greasy Hammond organ lines laid down over thick, funky beats somewhere between gritty 1960s boogaloo jazz and the progressive slickness of Acid Jazz. Walter was a founding member of the Greyboy Allstars, laying down bluesy, syncopated keyboard jabs and sustaining washes of tonal color. He also helped to write many of their tight, danceable cuts. His band, 20th Congress, continue in this tradition, with Walter's keyboards taking center stage - although he often shares the spotlight with high profile guests like saxophonist Gary Bartz. The material, though not necessarily breaking any new ground, always has a head-nodding groove. Live sets often feature covers of tunes by greats like Grant Green or Reuben Wilson.