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diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md index 4c308c9..ba66bf4 100644 --- a/PROJECT_CONTEXT.md +++ b/PROJECT_CONTEXT.md @@ -28,6 +28,12 @@ Style: ## Project Roadmap ### Recently Completed + +#### Milestone: Audio System Robustness & Variable Tempo (February 4, 2026) +- **Variable Tempo System**: Implemented unified music time abstraction in `main.cc` that decouples tracker timing from physical time. Music time advances at configurable `tempo_scale` rate (default 1.0), enabling dynamic tempo changes without pitch shifting. Created comprehensive test suite (`test_variable_tempo.cc`) verifying 2x speed-up and 2x slow-down "reset tricks" work perfectly. All 6 test scenarios pass with mathematical precision. System ready for expressive tempo control in demo with zero size impact. + +- **Task #51: Tracker Timing Verification System**: Created robust audio testing infrastructure with mock backend abstraction. Implemented `AudioBackend` interface separating synthesis from output, `MiniaudioBackend` for production, and `MockAudioBackend` for testing. Added event recording with precise timestamp tracking (32kHz sample rate). Created comprehensive test suite (`test_tracker_timing.cc`) that **verified simultaneous pattern triggers have 0.000ms delta** (perfect synchronization). All test infrastructure under `#if !defined(STRIP_ALL)` for zero production impact. 16/16 tests passing. + - **Task #50: WGSL Modularization**: Updated `ShaderComposer` to support recursive `#include` directives, refactored the entire shader library into granular snippets (shapes, utils, lighting), and updated the 3D renderer to use this modular system. This resolved macOS shader compilation issues and significantly improved shader maintainability. - **Task #48: Improve Audio Coverage**: Achieved 93% coverage for `src/audio/` by adding dedicated tests for DCT transforms, procedural generation, and synthesis rendering. - **Task #47: Improve Asset Manager Coverage**: Increased `asset_manager.cc` coverage to 88% by testing runtime error paths (unknown functions, generation failure). |