From the Central Square offices of Together’s headquarters, marketing manager Charles Mazzola looks out and imagines what Cambridge could look like in the near future. “Imagine this block,” he gestures with a broad sweep of his hand. “Every door packed.”

It’s a plausible estimate that Together 2013 — an international celebration of music, art and technology — will bring in 50,000 people. Will that make this year’s edition, the fourth overall of the electro-fest, the biggest and best one yet? That’s a question that Mazzola and managing director Alexander Maniatis answer with a resounding “Oh yeah!!” Electronic music (and hip-hop, and electro-pop, etc) is more than just their passion. It’s their mission.