The deepest zone in SONA. Infinite corridor. Dark glass cases on both sides holding sealed sound vessels, amber light from below. The Keeper has catalogued every frequency in this space and knows exactly where each one lives. Nothing is ever lost here. Nothing is ever easily found. That's the point.
Vast, sacred, still. The Archive is the oldest zone in terms of what it holds, though the corridor itself has no apparent age — it simply continues. Amber light from the floor. Dark glass cases on both sides, each containing a sealed vessel. The sound inside each one is inert until the Keeper opens it. When it opens, everyone in the corridor hears it.
Everything. The Archive holds frequencies from every other zone — orchestral, world, electronic, field. It also holds sounds that were captured before SONA existed and have never been heard again. The Keeper's system for organizing them is precise and entirely his own. He has not explained it to anyone. It works.