Jem Aswad Senior Music EditorThe city council of Oakland, California has declared August 25 “Digital Underground Day” in honor of the legendary group’s frontman and co-founder Gregory “Shock G” Jacobs, who died in April. The pioneering 1990s hip-hop group is one of the most legendary to emerge from the Bay Area city — Tupac Shakur began his professional career as a member — and August 25 is Shock G’s birthday.“The shockwaves produced by Shock G and digital underground continue to reverberate