ef4ea8fe86
Groundwork for the port's ask #4; it does not settle #4. Captured the game's own output over the boot intro following the ALSA file-tee recipe exactly -- paced pulse slave, --gpu=null, both mutes off. 148.02 s, 6ch float32 48 kHz, 0.15-0.16 % silence against the 0.31 % the recipe page records for its own clean run. Provenance is the XMA probe rather than a screenshot, which is the right evidence for an audio question: ADV's three contexts appear byte-exact (1294336 / 1118208 / 1171456), then the documented BGM_102 pair. Five of the six channels carry distinct content; BR is 82 % silent and 11-15 dB down. No channel is a copy of another -- the largest pairwise correlation is 0.70 between FL and FR. That rules out a stereo mix, so 'ship one stream' cannot be right and the port's held-wrong value stays wrong. It does NOT establish that summing is right, and the 6-channel count is Xenia's hardcoded kFrameChannelsDefault -- what is evidence is that five of them differ, which a stereo guest cannot produce. NOT settled and named as such: the stream-to-channel mapping. The cross-correlation of each captured channel against each decoded ADV stream has not been run. One boot, one movie, and --gpu=null means no video cross-check. Raw is 170 MB and is not committed; sent over share to the port. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
35 lines
1.4 KiB
Plaintext
35 lines
1.4 KiB
Plaintext
# The game's own audio output over the boot intro (Q9/#4 groundwork).
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#
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# 2026-08-30. Recipe: docs/re/audio-capture-alsa-file-tee.md, exactly.
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# ARGV: run-canary --apu=alsa --mute=false --gpu=null --xma_param_probe=true
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# ALSA file tee in front of a paced pulse slave; 6ch float32 @ 48 kHz.
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# Raw is 170 MB and is NOT committed -- sent via share.
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#
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# PROVENANCE (better than a screenshot for an audio question): the XMA probe
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# logged ADV's three contexts byte-exact against the disc --
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# ctx0 packets=632 byte_size=1294336
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# ctx1 packets=546 byte_size=1118208
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# ctx2 packets=572 byte_size=1171456
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# then two more (1150976 / 1269760) = the documented BGM_102 pair.
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#
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# CAPTURE QUALITY: 0.15-0.16 % silence on five channels, against the
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# 0.31 % the recipe page records for its clean --gpu=null run.
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#
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# ALSA CHANNEL ORDER: captured i holds source [0,1,4,5,2,3], i.e. the
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# labels below are FL FR BL BR FC LFE. Deterministic, not data loss.
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#
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frames 7105024 = 148.02 s, 6ch float32 @ 48 kHz
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ch name peak dBFS rms dBFS %silent
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0 FL -3.65 -22.26 0.16
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1 FR -2.22 -20.89 0.15
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2 BL -4.41 -24.77 0.15
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3 BR -11.65 -36.06 82.18
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4 FC -4.57 -24.81 0.16
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5 LFE -4.66 -24.38 0.16
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pairwise |r| > 0.5:
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ch0(FL) vs ch1(FR): r=+0.6996
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ch0(FL) vs ch4(FC): r=+0.5202
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ch1(FR) vs ch5(LFE): r=+0.5639
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