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# To-Do List
**High-level task tracker.** See design docs for details. Completed: `doc/COMPLETED.md`
---
## Priority 1: Spectral Brush Editor (Task #5) [IN PROGRESS]
Procedural spectrogram tool: 50-100× compression (5 KB .spec → ~100 bytes C++).
**Design:** `doc/SPECTRAL_BRUSH_EDITOR.md`
---
## Priority 2: CNN v2 8-bit Quantization
Reduce weights from f16 (~3.2 KB) to i8 (~1.6 KB).
**Requirements:** Quantization-aware training (QAT)
**Design:** `cnn_v2/docs/CNN_V2.md`
---
## Priority 3: Test Infrastructure Maintenance [ONGOING]
**Status:** 34/34 tests passing
**Outstanding TODOs:**
1. **test_sequence.cc** - Port legacy sequence tests (currently disabled)
- Lines 168, 173, 182: Re-enable lifecycle and simulation tests after port
2. **test_audio_engine.cc:152** - Re-enable commented test after debugging
3. **test_fft.cc:87** - Investigate FFT-DCT algorithm discrepancy
## Priority 4: Audio System Enhancements [LOW PRIORITY]
1. **`synth.cc`: use `ola_decode()` from `src/audio/ola.h`** — the OLA decode logic in
`synth_render()` is currently inlined for frame-by-frame lazy decoding. Refactor to
call `ola_decode()` for consistency with `spectool` and the test (requires decoupling
the per-frame lazy path, e.g. decode a full block on demand then serve samples).
2. **GPU-Accelerated PCM Synthesis:**
- Compute shader for direct PCM generation (bypass spectrogram)
- Write to compute buffer, readback to synth
---
## Priority 4: 3D System Enhancements (Task #18)
Pipeline for importing complex 3D scenes to replace hardcoded geometry.
**Status:** C++ object data loading complete. Shader SDF integration pending.
---
## Priority 4: WGSL Modularization (Task #50) [RECURRENT]
Ongoing shader code hygiene for granular, reusable snippets.
---
## Future: Size Optimization (64k Target)
- Task #22: Windows Native Platform (Win32)
- Task #28: Spectrogram Quantization
- Task #34: Full STL Removal
- Task #35: CRT Replacement
**Measure:** `./scripts/measure_size.sh`
---
**Backlog:** `doc/BACKLOG.md` for untriaged ideas
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