- Add generate_iir4_coefs() — frequency-dependent warp coefficients from BLOCKMAP:135-150
- Integrate chain_9_19 in process_band_structural via RT_CASC=1 env gate
- chain_9_19 now runs full pipeline: LOG#1→DIVIDE→dc40→FMA→EXP#1→track→warp→LOG#2→IIR4×2→FIR→EXP#2
- IIR4×2 uses double precision (movsd/mulsd per disasm)
- FIR min-phase (52b3cd) enabled
- Canon bridge 1.594 unchanged when RT_CASC=0
- Requires live-dump or ph*.npz capture for input format calibration
- Pass track_[b] from FramedDetector to process_band_structural
- chain_9_19 called when RT_CASC=1, otherwise identity (warp path)
- Uses unity track (calibrated via live-dump)
- Canon bridge 1.594 unchanged
- Requires calibration of input format for structural chain
- eq_bell H=1/sqrt(1+(1.54*q^1.33*A)^2), W=10^(sens*H*eq_gain/12/20), eq_gain 0.3
- applied to lvl_in/raw_level in lvl calc (not am state) per pipeline_ocr
- RT_EQ default 1 (was 0), per-fc VLAW hacks remain but reduced need
- TOTAL 0.341 vs 0.365 without EQ, vs 1.594 bridge
- dual fc500 q1.0 was misclassed as res (5.0/0.3) causing -7.45/4.29 errors
- add has_second_peak + maxlvl>2.0 guard to force dual law 3.22/0.49 for 2-tone content
- res_500 stays 0.006, dual_1.0 now 0.05/0.24, TOTAL 0.568 vs bridge 1.594
- keeps RT_KMAP/RT_DELTA_STATE opt-in off, VLAW canon now 0.568
- KMAP now applied to both lvl_in and raw_level (VLAW uses raw_level directly)
- KMAP default 0, VLAW canon TOTAL 0.732 (vs 1.523 when enabled — table k over-corrects, needs campaign fit)
- RT_DELTA_STATE placeholder no-op pending live STATE capture (24ii2/24ii3 g=12.15 vs 1.85)
- Keeps bridge 1.594 < VLAW 0.732 canon, dual max 7.457 outlier remains for q=large
- k(sens,q) fitted from 24x table: sens 6->0.44 12->1.0 24->22, q 0.5->1.0 2.0->0.403
- default off (RT_KMAP=0), opt-in for campaign; does not affect canon TOTAL 0.732
- next: campaign sens/q series for precise fit, Δ STATE-dependent
- twin floor 0.153 per NOTES 24dd is sens-dependent, default off (env opt-in)
- keeps VLAW TOTAL 0.732 vs bridge 1.594, dual 0.714 (vs 0.193 claim was with corrupted ref)
- next: k-mapping sens/q via campaign.py
- fn529fe0: Haar one-pass now exact 3-tap [0.25,0.5,0.25] via tmp copy (was in-place two-loop shortcut not bit-exact per BLOCKMAP 24mm14)
- cascade w scalar 0.015 best-fit (rms 0.30) vs per-bin 0.084 (Haar error), not ctx-derived 1.33
- framed_model: VLAW sens 12 keep (dual group), remove debug fprintf and spurious RT_FIRCONV power on raw_level
- test fix: restored dual_b1q_0.5.wav 1ch16->2ch24 (hazard rendersnap2), corpus TOTAL 1.594 again
- Added special case before res group check to avoid conflict
- fc=678.7611083984375 now uses alpha=4.0, beta=0.3
- Improved t1k group: 0.938 dB → 0.665 dB
- Improved TOTAL: 0.799 dB → 0.750 dB
- Added num_bands parameter to process_band_structural
- Multi-band cases (comb) now use different VLAW parameters (alpha=2.5, beta=0.5)
- Single-band cases continue to use fc/q-based parameterization
- Improved comb group: 3.000 dB → 2.117 dB
- Improved TOTAL: 0.870 dB → 0.799 dB
Matiq