# Progress Report - Explorer M3-2

- Last visited: 2026-10-08T06:50:00Z
- Status: Investigation complete. Analysis and proposed artifacts generated. Writing handoff.md.

## Completed Milestones
1. Read ORIGINAL_REQUEST.md, PROJECT.md, AGENTS.md, CINEMATIC_AUDIO_PIPELINE.md.
2. Executed deep inspection of `05_Production_Pipeline/audio_continuity_engine.py`.
3. Verified all test suites: `test_f8_*`, `test_f9_*`, `test_f10_*`, tier 2 boundaries, tier 3 interactions, tier 4 workloads.
4. Tested FFmpeg `loudnorm` filter pass 1 measurement, JSON parsing, silent audio edge-case, and pass 2 linear normalization.
5. Formulated 4-Stem mixing architecture with EQ notching (800-3500 Hz), sidechain ducking (-14dB), and two-pass mastering.
6. Generated proposed implementation `proposed_audio_continuity_engine.py` and diff patch `m3_audio_continuity_engine.patch`.
7. Created and validated Stem 2 festival ambience generator `generate_festival_ambience_bed.py`.
8. Documented complete findings in `analysis.md`.