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 ---
 
+## Priority 2: Audio Pipeline Streamlining (Task #72)
+
+**Goal**: Optimize the audio pipeline to reduce memory copies and simplify the data flow by using direct additive mixing and deferred clipping.
+
+- [ ] **Phase 1: Direct Additive Mixing**
+  - Modify `Synth` and `Tracker` to accept a target output buffer for direct additive mixing instead of returning isolated voice samples.
+  - Eliminate temporary buffers used for individual voice rendering.
+- [ ] **Phase 2: Float32 Internal Pipeline**
+  - Ensure the entire internal pipeline (synthesis, mixing) maintains full `float32` precision without intermediate clipping.
+- [ ] **Phase 3: Final Clipping & Conversion**
+  - Implement a single, final stage that performs clipping (limiter/clamping) and conversion to `int16` (or other hardware-native formats) just before the audio backend delivery.
+- [ ] **Phase 4: Verification**
+  - Verify audio quality and performance improvements with `test_demo` and existing audio tests.
+
+---
+
 ## Priority 2: 3D System Enhancements (Task #18)
 **Goal:** Establish a pipeline for importing complex 3D scenes to replace hardcoded geometry.