Merge remote-tracking branch 'origin/audio'

CHANGELOG.md

@@ -25,12 +25,17 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - Mouse-relative facing and movement (#526, D-054) — mouse position determines facing direction (client-side float), WASD remapped to cursor-relative (W=toward, S=away, A/D=strafe), SET_FACING action sends octant to server, smooth facing indicator rotation
 - Room reset client UX (#502) — amber reset_plate tile type, 0.15s screen flash on room reset, 'Reset Room' interaction verb
 - Auto-checklist progress tracking (#503) — ChecklistEvaluator parses room YAML and evaluates 7 condition types against GameState with latching, ChecklistOverlay renders progress in gauntlet mode only, 48 new tests
+- 4 ambient zone loops: station base, workplace, bar, corridor — SAO-generated organic soundscape with crossfade loop points (#327)
+- 2 footstep SFX: metal walk and run — SAO hybrid with best-transient extraction (#327)
+- `audio-batch` command — batch audio generation from JSON manifests, supports SAO and harmonic synthesis, with `--dry-run`, `--only`, and `--skip-existing` flags
+- `--post` and `--output-ogg` flags on `audio-generate` — chain post-processing (trim, normalize, convert) into a single command
 
 ### Changed
 - `push-pr` skill now runs `/commit` first when uncommitted changes are detected
 - Insert open/close now sends explicit PauseSimulation/ResumeSimulation (#518, D-058) — replaces toggle-style pause with idempotent pair
 - Interaction list colors reference Constants.IMPLANT_TEXT_COLOR instead of hardcoded values
 - World radial menu uses theme font instead of ThemeDB.fallback_font
+- Monologue chimes replaced with production-quality manual synthesis — insert-tech aesthetic per D-074, pure sine harmonics with mathematical envelopes (#327)
 
 ### Fixed
 - Bidirectional relationship check (#515) — Check 9 tested `target in npc_rels` which missed NPCs with no relationship entries; changed to `target in self.npcs`