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soothe2-re/dsp
Matiq 1a616e1b7b feat(dsp): IIR3 bidirectional per decomp (fwd+bwd x2), combine semantics decoded
Decomp (consumers_out.txt:955-1075): IIR3 = TWO [reset,forward,backward]
pairs, state persists fwd->bwd; y = B3*x + A3*state. Replaces 2x forward.
Combine block decoded from thunks: f6f8 = mask - acc (8d60, dst=3rd arg);
f6f8 += kRTAtt/kRTRel * acc (halves); acc += mask (5a20). KEY FINDING:
in online single-band path acc/f6f8 have NO consumer before warp/dry-wet
- combine affects output only via multiband/FFT-conv stages (Step 2 scope
narrowed). LUT_MULT retuned 4.4 -> 4.2. Smoke mean|err| 0.993 -> 1.021
(faithful transcription kept over tuned fwd-only). Checks PASS, guard PASS.
2026-08-21 12:54:46 +03:00
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