Full Project Audit Report — TechTown Acoustics 2.0

Date: 2026-03-04 | Auditor: Claude (Opus 4.6) | Requested by: Obai

Audit Scope

Per user request: audit and review the entire project folder — verify all files are self-contained, all technical data is correct, all source files are inside the working directory, and identify any discrepancies.

1. File Organization Audit

Root Directory (AFTER cleanup)

Item	Type	Status
`PROJECT-INDEX.html`	Navigation page	CLEAN
12 subdirectories	Project structure	CLEAN
`Prompts for Reference...`	READ-ONLY LLM texts	UNCHANGED

Files Moved to Source/ (this audit)

Original Location (Root)	New Location (Source/)	Size
`All Floor - Only Yellow concerned.png`	`Source/2026-03-04_All-Floor-Yellow-Zone.png`	1.13 MB
`B3.png`	`Source/2026-03-04_B3-Yellow-Zone-Dimensions.png`	56 KB
`SD-HVAC-ALL-241225-V02_new.dxf`	`Source/2026-03-04_v01_HVAC-All-Floors.dxf`	39 MB
`Techtown...layout...2026_new.dxf`	`Source/2026-03-04_Furniture-Layout-ODA-Converted.dxf`	6.87 MB

Result: Root is now clean. All source files properly archived with date-prefixed naming.

Source/ Folder Contents (5 files)

File	Size	Role	Status
`2026-03-04_Furniture-Layout-Original-AutoCAD.dxf`	7.70 MB	Architect's native (Sarah)	AUTHORITATIVE
`2026-03-04_Furniture-Layout-ODA-Converted.dxf`	6.87 MB	Obai's ODA conversion	SUPERSEDED
`2026-03-04_v01_HVAC-All-Floors.dxf`	39 MB	HVAC drawing — all floors	ACTIVE
`2026-03-04_All-Floor-Yellow-Zone.png`	1.13 MB	Full floor plan reference	REFERENCE
`2026-03-04_B3-Yellow-Zone-Dimensions.png`	56 KB	Dimensioned B3 plan	REFERENCE

External References Check

PASS — No files reference paths outside D:\Projects\Special\TechTown\Acoustics2.0\. All file references in HTML reports use relative paths.

2. DXF Version Clarification

Two furniture DXFs exist — this caused confusion during the session:

Property	Original AutoCAD (Sarah)	ODA Converted (Obai)
File	`Furniture-Layout-Original-AutoCAD.dxf`	`Furniture-Layout-ODA-Converted.dxf`
Size	7.70 MB	6.87 MB
Entities	25,274	21,727
Layers	38	44
Saved by	"sarah" (architect)	"obai"
Format	Direct AutoCAD export	ODA File Converter export
Annotations	131 DIMENSION entities	102 DIMENSION entities
Extra layers	—	`7 - Furniture - Custom`, `Customized Furniture Codes`

Structural geometry is IDENTICAL between both files. All wall coordinates and column positions match exactly. The Sarah file is the authoritative source.

Important: The furniture DXF contains ZERO HVAC layers. All HVAC data is exclusively in the dedicated HVAC DXF.

3. Stale Data Identified

CRITICAL: Locked Scope v01 — 6 Stale Values

Scope/2026-03-04_v01_Locked-Scope.html was created BEFORE the user shared cross-session data. The following values are now outdated:

Location	Current Value (WRONG)	Correct Value	Source of Correction
Line ~72	Ceiling: 290 cm	350 cm (to concrete slab)	User cross-session data
Line ~87	Control Room: NC-20	NC-25	User cross-session data
Line ~88	Video/Podcast: NC-20	NC-25	User cross-session data
Line ~135	Samsung DVM VRF	Daikin VRF	HVAC contractor confirmation
Line ~165	Samsung DVM specs (assumption)	Daikin specs	HVAC contractor confirmation
Line ~188	Buffer spine: NOT SELECTED	REQUIRED	User cross-session data

Action Required: Create Scope/2026-03-04_v02_Locked-Scope.html with all corrections applied.

MODERATE: Phase 1 Geometry Report — Volume Calculation

Reports/2026-03-04_v01_Phase-1-Geometry-Report.html

Section	Current Value (OLD)	Correct Value
Volume (raw)	84.5 m³ (29.13 × 2.90)	101.9 m³ (29.13 × 3.50)
Volume (effective)	75.7 m³ (29.13 × 2.60)	91.8 m³ (29.13 × 3.15)

The area calculation (29.13 m²) remains valid. Only the volume section is affected by the ceiling height change.

MODERATE: Area Calculation Working Notes

Calculations/2026-03-04_v01_Area-Calculation.md

Lines 344-349 use 2.9m ceiling for volume calculation — same issue as above.

LOW: Project Analysis Report — Historical Samsung DVM References

Reports/2026-03-04_Project-Analysis-Report.html

Multiple references to "Samsung DVM VRF" and "290 cm" ceiling in the Phase 0 analysis report. Since this is a historical document recording the state at the START of the session (before corrections), these can be left as-is. However, they should NOT be used as reference values.

Recommendation: Add a banner noting this is a Phase 0 historical document with superseded values.

4. Technical Data Cross-Check

Geometry (ALL VERIFIED CORRECT)

Parameter	Value	Verified In
South wall (E-W)	7.37 m (737 cm)	DXF, B3.png, all reports
North wall (E-W)	~6.15 m (614.8 cm)	Calculated from diagonal
East wall (N-S)	4.31 m (431 cm)	DXF, B3.png, all reports
NW diagonal	4.48 m (448 cm)	DXF, B3.png, all reports
Diagonal horiz. component	1.22 m (122.2 cm)	Calculated: √(448² - 431²)
Gross area	29.13 m²	½ × (737 + 614.8) × 431
Shape	Right trapezoid	Confirmed in DXF

Columns (VERIFIED CORRECT)

Column	Position (center)	Size	Notes
COL-1	(3.95, 1.36)	60 × 50 cm	Interior, mid-zone
COL-2	(~7.10, 1.36)	~55 × 50 cm	Against east wall

Width Formula (VERIFIED CORRECT)

W = 7.37 - (Y / 4.31) × 1.22 — checked at Y=0 (gives 7.37) and Y=4.31 (gives 6.15).

HVAC Equipment (VERIFIED CORRECT)

Finding	Value	Status
System type	Daikin VRF	Confirmed by contractor
Unit inside zone	U380 near SE corner (~6.88, 0.50)	From HVAC DXF analysis
Units outside zone	U370/U371 (~2.7m east), U328 (~10m east)	From HVAC DXF analysis
Coordinate transformation	HVAC_X = Furniture_X × 1000 + 203,000	Derived from reference blocks
Diffusers inside zone	1 (barely) at ~1.73m east	Most are OUTSIDE to the west

NC/RT60/STC Targets (CURRENT CORRECT VALUES)

Room	NC	RT60 (s)	STC
VO Live Room	NC-15	0.15–0.25	58–68 (perimeter + server wall)
Control Room	NC-25	0.30–0.40	—
Video/Podcast	NC-25	0.25–0.40	—
Editing	NC-30–35	≤ 0.50	—

5. File Inventory (Complete)

Reports/ (3 files)

2026-03-04_Project-Analysis-Report.html — Phase 0 analysis (HISTORICAL)
2026-03-04_v01_Phase-1-Geometry-Report.html — Phase 1 geometry (volume needs update)
2026-03-04_v01_Phase-2-Layout-Options.html — Phase 2 layouts (CURRENT, awaiting Q1-Q6)

Scope/ (1 file)

2026-03-04_v01_Locked-Scope.html — v01 scope (6 STALE VALUES — needs v02)

Calculations/ (1 file)

2026-03-04_v01_Area-Calculation.md — Area calc (volume section needs update)

HVAC/ (4 files)

2026-03-04_v01_HVAC-Coordination-Log.md — VERIFIED CORRECT
2026-03-04_v01_HVAC-Equipment-Map.md — VERIFIED CORRECT
2026-03-04_v01_B3-Zone-Map-HVAC.html — VERIFIED CORRECT
2026-03-04_v01_Zone-Numbers-For-Gemini.md — VERIFIED CORRECT

LOG/ (3 files)

CHANGELOG.md — VERIFIED CORRECT (14 entries)
2026-03-04_Session-Log.md — CREATED this audit
2026-03-04_Audit-Report.md — THIS FILE

Source/ (5 files)

All source files verified present and correctly named (see Section 1).

Empty Folders (awaiting future phases)

BOM/, Charts/, Construction-Guides/, DXF-Output/, Layouts/, Questions/

6. PROJECT-INDEX Updates (This Audit)

Added HVAC section with 4 file links (Coordination Log, Equipment Map, Zone Map, Gemini Data)
Updated Source files convention note (files are now in Source/, not root)

7. Recommended Next Actions

Immediate (Before Continuing Design Work)

Create Locked Scope v02 — Apply all 6 corrections from Section 3
Get user answers to Phase 2 Q1-Q6 — Layout selection is blocking Phase 3

Short-Term

Annotate Phase 0 Analysis Report — Add banner: "Historical document — superseded values exist"
Update Phase 1 volume calculation — Either annotate v01 or create v02 with 3.5m ceiling

Pending External Actions

HVAC team needs updated floor plan from Sarah (architect)
HVAC team to confirm airflow (CFM/L/s) for MediaVerse area
HVAC team to provide Daikin model numbers for noise data sheets
HVAC team to confirm silencer fitment in 60 cm ceiling space
HVAC team to confirm indoor unit mounting method

8. Audit Conclusion

Overall project state: SOUND with corrections needed.

Geometry: All area and dimension calculations verified correct
HVAC analysis: All equipment mapping and coordination data verified correct
File organization: Clean after root file cleanup
Self-contained: No external file references found
Stale data: 6 values in Locked Scope need correction (Scope v02)
Volume calculations: Need ceiling height update in 2 files
Blocking item: Phase 2 layout selection (Q1-Q6 answers needed from user)

The project foundation is solid. The stale data stems from a single event: scope updates received mid-session from the user's parallel LLM work. All files created AFTER that update (Phase 2, HVAC docs) correctly reflect the new values. Only files created BEFORE the update (Scope v01, Phase 1, Area Calc) contain outdated ceiling/NC/VRF values.

Audit completed 2026-03-04. This report is part of the project audit trail.