Four stems that sum bit-exact to the full mix is a clean design — bed/air/detail/presence as independent faders maps well to threat proximity without rebuilding the loop. Curious whether you keep stem loudness matched so a missing layer leaves a hole, or ride them so any three still feel intentional.
I'm the creator, good question. They're ridden, not matched. Each stem gets its own fixed level in the scene code. Then one shared gain brings the full mix to -20 LUFS, so the stems still sum to the mix exactly. Measured with ffmpeg ebur128 across the 6 scenes:
So bed and air are the loudest layers, and detail/presence sit 4-8 dB lower by design. (The synthesis code was written with AI assistance.)
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