diff --git a/docs_v1.0/M4_workspace/2026-05-13_trace_audio_fix_response.md b/docs_v1.0/M4_workspace/2026-05-13_trace_audio_fix_response.md
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+# Trace Video Audio Fix — binary 交付
+
+**Date**: 2026-05-13
+**From**: M5
+**To**: M4
+**Ref**: trace video no audio issue
+
+---
+
+## 修正
+
+trace video API (`/api/v1/file/:uuid/trace/:id/video`) 已加入音軌。
+
+```diff
+- "-an",
++ "-c:a", "aac",
+```
+
+## Binary
+
+更新版 binary 已放到 delivery 目錄：
+
+```
+release/delivery/v1.0.0_20260513_2115/
+  momentry_v1.0.0                  ← 原始版本
+  momentry_v1.0.0_traceaudio       ← 含音軌修正 (21 MB, commit adae263)
+```
+
+## 部署
+
+```bash
+# 停掉舊 server
+pkill momentry
+
+# 換 binary
+cp momentry_v1.0.0_traceaudio /path/to/production/binary
+
+# 重啟
+DATABASE_SCHEMA=public /path/to/production/binary server --port 3002
+```