Rumble Send
INTERNAL fragment (Stage 2 slice 2c) — the generative half of the Rumble rig, wired as a per-drum-LANE SEND rather than a standalone rig. It has NO kick/seq/clock of its own: an ENV-FOLLOWER on its input (fed the lane's per-voice tap by audio.js) EXCITES every layer from the lane's kick — the sub + growl boom/grind per hit, and the atmosphere is GATED too (noise → thin → hp → a base-0 VCA the follower opens → reverb, so the reverb sustains the gated bursts into a breathing wash yet it falls SILENT when the pattern stops — no drone). All three VCAs sit at base 0, so the whole send is silent when nothing plays. Its master EQ output is wired to the kit bus by audio.js. Not a palette rig — `hidden`, so it never shows as a droppable card; it is expanded only by add_drum_lane_send.