diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f11246d4..afd3e28c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 ## [Unreleased]
 
 ### Changed
+- UI audio assets revised — monologue chimes re-generated (0.8s, insert-tech aesthetic), fog_recognition re-generated (was silent), all 8 assets normalized to 44.1kHz stereo LUFS -16 (#453)
 - review-pr skill: explicit verdict rules — critical/warning → REQUEST_CHANGES, suggestion-only → APPROVE
 
 ### Added