# Which ADV voice stream sits where -- the assignment, and how it was settled.
#
# 2026-08-30. Chunks dumped by examples/adv_voice_dump.rs from the resolved
# movie voice region (dat/sound 433930240..437044592), decoded with ffmpeg's
# xma decoder to f32le 48 kHz stereo.
#
# chunk  bytes    byte_size  probe ctx   dur      L rms    R rms    L/R r   R silent
#   0     806972    806912   ctx0 TAIL   84.55s  -24.79   -24.81   +0.932    53.1%
#   1    1118268   1118208   ctx1       137.32s  -20.33     -inf   +0.000   100.0%
#   2    1171516   1171456   ctx2       137.32s  -30.67   -30.68   +0.962    53.6%
#
# ctx0's full byte_size is 1294336; the region resolver starts at the
# predecessor cue's trailer, so chunk 0 is its clipped tail (62 %).
#
# 🔴 WHAT DID NOT WORK: envelope correlation cannot discriminate.
# Every residual channel shares the dialogue's activity timing, so a
# ⚠️ IN THIS REGIME ONLY (corrected 2026-08-30): the port controlled the same
# estimator on a single dialogue track and got r=1.0000 at zero offset with
# -0.08..+0.08 elsewhere -- it localises sharply. The saturation below needs
# CONCURRENT streams sharing timing at zero lag. Not a general limit.
# per-pair lag search returns 0.86-0.95 for EVERY chunk against EVERY
# channel. Recorded because it looks like a strong result and is not.
#
# 🔴 Sample-level correlation also fails: the chunks do not start with the
# movie and the XMA decode's framing offset is unknown, so r ~ 0.
#
# ✅ WHAT SETTLES IT: level, under the SAME 0.600 gain the bed uses.
#
# chunk   level   x0.600   nearest residuals (|error| dB)
#  0L    -24.79   -29.23   FL 0.05  FR 0.06  FC 3.96
#  0R    -24.81   -29.25   FL 0.03  FR 0.04  FC 3.98
#  1L    -20.33   -24.77   FC 0.50  FL 4.51  FR 4.52
#  2L    -30.67   -35.11   BL 0.35  BR 0.38  FR 5.82
#  2R    -30.68   -35.12   BL 0.34  BR 0.37  FR 5.83
#
# Ratio test, immune to any worry about chunk 0 being clipped:
#   chunk0L - chunk2L = +5.88 dB ;  FL - BL = +6.18 dB  -> agree to 0.30 dB
#   swapped, the ratio would be wrong by 11.76 dB
#
# Structural confirmation: chunk 1 is the ONLY chunk with a digitally silent
# channel (R, 100 %), and LFE is the ONLY output channel with an empty
# residual (-115.73 dBFS). One-to-one.
#
# Internal L/R correlation also tracks:
#   chunk0 +0.932 <-> FL/FR residual +0.918
#   chunk2 +0.962 <-> BL/BR residual +0.929
#
# ==> ctx0 (1294336) -> FL, FR
# ==> ctx1 (1118208) -> FC, LFE silent
# ==> ctx2 (1171456) -> BL, BR