H3 Retime Audio (bullet-time bed + transients) [alpha]

EXPERIMENTAL (alpha), new 2026-08-21; the classic pipeline nodes are unchanged. Builds the soundtrack for a clip that KEEPS the dilated timeline (skip H3 Exact Recover, the slow motion is the product). Rate-1 spans always carry the baseline track verbatim, placed sample-exact against the hold map; only held spans get a treatment: - stretched: pitch-kept phase-vocoder stretch of the baseline (same engine as H3 Audio Smear). Deterministic, safe, transients smear at high holds. - varispeed: the classic film move, resample with the pitch drop. Great at x2-3, rumbly by x8. - generated: pass 2's own dilated-clock audio inside the held spans (wire it into 'generated'). Without an audio-smear init upstream, pass 2 writes natural-rate ambience over the slowed picture - the cinematic bullet-time convention; with the init, a genuinely slowed take. Which one you get is a GRAPH choice, this node just composes it. anchor_transients re-detects impacts in the baseline inside held spans and lays the UNSTRETCHED hit back at its exactly-mapped dilated position, replacing the bed locally - the whip crack stays a crack instead of becoming a whoosh. Composes with every mode. All clocks: input baseline is the world clock, 'generated' and the output are the dilated clock. Wire the SAME hold_map the video side used.