engine-sim-cli/DOCUMENTATION_TREE.txt at master · danieljsinclair/engine-sim-cli · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
AUDIO CRACKLE INVESTIGATION - DOCUMENTATION STRUCTURE
====================================================

START HERE
│
├── DOCUMENTATION_MASTER_INDEX.md ← Navigation hub (START HERE)
│   ├── Quick Start Guide
│   ├── Documentation Structure
│   ├── Investigation Timeline
│   └── Success Criteria
│
├── DOCUMENTATION_SUMMARY.md ← What was created
│   ├── New Documentation Files Created
│   ├── Current Status
│   └── Next Steps
│
├── HANDOVER_TEST2.md ← Implementation guide (READ THIS FOR TEST 2)
│   ├── Executive Summary
│   ├── Root Cause (CONFIRMED)
│   ├── Test 2 Implementation Plan
│   ├── Code Changes Required
│   ├── Expected Outcomes
│   └── Success Criteria
│
├── TEST_INVESTIGATION_LOG.md ← Complete chronological test record
│   ├── Test 1: Audio Thread Wakeup Timing Analysis ✅ COMPLETE
│   │   ├── Problem Statement
│   │   ├── Hypothesis 4
│   │   ├── Code Changes
│   │   ├── Build Result
│   │   ├── Test Results
│   │   ├── Diagnostics Collected
│   │   ├── Analysis
│   │   └── Next Step (Test 2)
│   │
│   └── Test 2: Fixed-Interval Rendering ⏳ PENDING
│       ├── Problem Statement
│       ├── Hypothesis
│       ├── Code Changes (Planned)
│       ├── Build Result (Pending)
│       ├── Test Results (Pending)
│       └── Analysis (Pending)
│
├── AUDIO_THEORIES_TRACKING.md ← All theories and evidence
│   ├── CURRENT STATUS SUMMARY
│   ├── Phase 2: Root Cause Identified ✅
│   │   ├── Hypothesis 4 Statement
│   │   ├── Test Implementation
│   │   ├── Evidence Collected
│   │   ├── Root Cause Analysis
│   │   └── Next Steps
│   │
│   ├── Phase 1: Pull Model Position Hypothesis ❌ DISPROVEN
│   ├── GUI vs CLI Comparison Table
│   ├── Session 2025-02-03: User Testing
│   ├── Theory: CLI Update Rate vs GUI Update Rate ❌ DISPROVEN
│   ├── Theory: Synthesizer Output Discontinuities ✅ CONFIRMED
│   ├── Theory: Buffer Lead Management ✅ IDENTIFIED
│   └── [Historical theories...]
│
├── TEST1 Evidence and Analysis
│   ├── TEST1_AUDIO_THREAD_WAKEUP_ANALYSIS.md
│   │   ├── Executive Summary (Hypothesis 4: CONFIRMED)
│   │   ├── Build Results
│   │   ├── Test Results (Engine and Sine)
│   │   ├── Critical Evidence Timeline
│   │   ├── Root Cause Analysis
│   │   └── Recommendations
│   │
│   ├── TEST1_EVIDENCE_SUMMARY.md
│   │   ├── Test Configuration
│   │   ├── Critical Evidence Collected
│   │   ├── Data Files Generated
│   │   └── Hypothesis Verification
│   │
│   ├── engine_test.log ← Raw test data (565 wakeups)
│   └── sine_test.log ← Comparison test data (4 wakeups)
│
├── Historical Documentation (Background)
│   ├── AUDIO_INVESTIGATION_HANDOVER.md ← Pre-Test 1 handover
│   ├── AUDIO_DIAGNOSTIC_REPORT.md
│   ├── AUDIO_FIX_IMPLEMENTATION_GUIDE.md
│   ├── AUDIO_CRACKLING_FIX_REPORT.md
│   ├── AUDIO_THEORY_SYNTHESIZER.md
│   ├── DOCUMENTATION_INDEX.md (Old)
│   ├── README_DOCUMENTATION.md
│   └── [Other historical files...]
│
└── Code Files
    ├── engine-sim-bridge/engine-sim/src/synthesizer.cpp
    │   └── Lines 221-266: renderAudio() function
    │       ├── Test 1: Added diagnostics ✅
    │       └── Test 2: Implement fixed-interval rendering ⏳
    │
    ├── src/engine_sim_cli.cpp
    └── engine-sim-bridge/engine-sim/src/engine_sim_application.cpp (GUI reference)

====================================================
INVESTIGATION STATUS
====================================================

Phase 1: Initial Investigation ✅ COMPLETE
    - Ruled out 5+ common theories
    - All diagnostics implemented
    - Problem narrowed down

Phase 2: Root Cause Identification ✅ COMPLETE
    - Hypothesis 4 confirmed
    - Audio thread timing unpredictability identified
    - Evidence: 6ms to 1.2 seconds wakeup variation
    - Burst writes: 1411 samples (3x normal)
    - 18 discontinuities in 10 seconds

Phase 3: Fix Implementation ⏳ PENDING
    - Test 2: Fixed-Interval Rendering
    - Implementation guide ready
    - Code changes specified
    - Awaiting implementation

====================================================
QUICK START FOR NEXT DEVELOPER
====================================================

1. Read DOCUMENTATION_MASTER_INDEX.md (5 min)
2. Read HANDOVER_TEST2.md (10 min)
3. Read TEST_INVESTIGATION_LOG.md - Test 1 entry (10 min)
4. Implement Test 2 code changes (15 min)
5. Build and test (5 min)
6. Analyze results (15 min)
7. Update documentation (10 min)

Total time: ~1 hour to implement Test 2

====================================================
DOCUMENTATION PRINCIPLES
====================================================

✅ Update after EVERY attempt
✅ Include FAILURES (they're progress)
✅ SHOW EVIDENCE (code diffs, outputs, measurements)
✅ NO SPECULATION (only what actually happened)
✅ MARK RESOLUTION (when solved, document what worked)

====================================================