molluskandClaude Opus 4.8
915ad8a1ee
Extend the mixer unit tests: pin apply_volume's as-i16 truncation-toward-zero semantics (3*0.5 -> 1, -3*0.5 -> -1, not round-to-nearest), in-range amplify without clamp, three-peer sum, mix_frames zero-padding when the output is longer than every peer frame, and frame_level mid-range (constant 16384 -> ~0.5). Tests-only; no production change. Implemented by Gemini (junior implementer), reviewed and verified by senior (cargo build + clippy --all-targets + cargo test all green). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>