Guard - Traditional (look-ahead) - Summary

Scenario Settings

Timing	Traditional (look-ahead)
Tail Guard config	tail-w1250-p40
Fast mode	disabled
Report events	16 total (8 per split target)
Minimum upward leveling need	4.0 dB at pre-event anchor
Target-tracking min work	1.0 dB guard-off movement
Under-leveling threshold	seek floor < 0.35
Selection rejects on low need	187

Explicit Capture Args

Parameter	Value
Common args
`--test`	`flag`
`--blockSizeMs`	`10`
`--sampleRate`	`clip sample rate`
`--channelLink`	`1`
`--novideo`	`flag`
`--timingMode`	`3`
`--lookaheadModeV2`	`1`
`--sidechainMode`	`0`
`--rateMode`	`0`
`--lowLevelTypeV3`	`0`
`--toleranceMode`	`0`
`--targetLoudness`	`-12.000`
`--targetTolerance`	`0.000`
`--tailSuppressionDb`	`0.000`
Guard Off args
`--guardMode`	`0`
`--tailPercentile`	`0.0`
`--transientPercentile`	`100.0`
`--guardWindowMs`	`1250.0`
Tail Guard args
`--guardMode`	`1`
`--tailPercentile`	`40.00`
`--transientPercentile`	`100.0`
`--guardWindowMs`	`1250.0`

Tail Guard Config

Timing	Traditional (look-ahead)
Config slug	tail-w1250-p40
Guard window	1250 ms
Tail percentile	40.0 %
Tail suppression	0.0 dB
Minimum upward leveling need	4.0 dB
Median selected upward need	5.87 dB
P25 dry restoration ratio	0.83
Median seek floor	1.00
Under-leveling	0.0%

Dry-relative metrics use the raw input breath-to-anchor delta as the ideal target while retaining guard-off vs Tail Guard attenuation and contrast metrics for continuity. Dry-anchor fallback was needed for 0 of 16 clips.

Tail Guard Aggregate Metrics

Metric	Tail Guard
Median upward leveling need	5.87 dB
Median guard-off pre-event target seek	5.85 dB
P25 guard-off pre-event target seek	5.48 dB
Median target-seek floor ratio	1.00
P25 target-seek floor ratio	0.95
Median target error increase	0.00 dB
P90 target error increase	0.00 dB
Under-leveling window rate	0.0%
Applicable target-tracking windows	45
Median dry restoration ratio	0.90
P25 dry restoration ratio	0.83
Median dry ideal error	1.28 dB
Median attenuation	13.22 dB
Median contrast improvement	12.49 dB
Median anchor drift	0.13 dB
P90 anchor drift	1.33 dB
Success rate	100.0%
Median recovery drift	0.00 dB
Median far-window drift	0.00 dB

Tail Guard Weakest Dry Restoration

Clip	Ratio
test-clean:3575_170457_000023_000002:1	0.77
dev-clean:3853_163249_000160_000000:2	0.80
dev-clean:5694_64029_000008_000001:1	0.82
dev-clean:2428_83699_000015_000001:2	0.82
dev-clean:3853_163249_000064_000000:1	0.83

Tail Guard Weakest Seek Floors

Clip	Seek Floor
dev-clean:3853_163249_000064_000000:1	0.73
test-clean:4970_29095_000049_000001:2	0.87
test-clean:4077_13754_000002_000000:1	0.90
test-clean:2300_131720_000003_000000:1	0.91
test-clean:8463_294825_000024_000000:4	0.97

Tail Guard Highest Anchor Drift

Clip	Drift
dev-clean:3853_163249_000160_000000:2	2.09 dB
dev-clean:3853_163249_000064_000000:1	1.51 dB
test-clean:3575_170457_000023_000002:1	1.15 dB
test-clean:4970_29095_000049_000001:2	0.72 dB
test-clean:2300_131720_000003_000000:1	0.65 dB

Assertion Log 17 entries

Status	Time	Condition / Message
PASS	14:30:30	Guard Tail Guard median attenuation: 13.22 dB (expected >= 1.50 dB)
PASS	14:30:30	Guard Tail Guard median contrast improvement: 12.49 dB (expected >= 1.00 dB)
PASS	14:30:30	Guard Tail Guard median anchor drift: 0.13 dB (expected <= 0.75 dB)
PASS	14:30:30	Guard Tail Guard p90 anchor drift: 1.33 dB (expected <= 1.50 dB)
PASS	14:30:30	Guard Tail Guard success rate: 100.0% (expected >= 70.0%)
PASS	14:30:30	Guard Tail Guard median dry restoration ratio: 0.90 (expected >= 0.70)
PASS	14:30:30	Guard Tail Guard p25 dry restoration ratio: 0.83 (expected >= 0.50)
PASS	14:30:30	Guard Tail Guard median recovery drift: 0.00 dB (expected <= 4.25 dB)
PASS	14:30:30	Guard Tail Guard median guard-off pre-event target seek: 5.85 dB (expected >= 1.50 dB)
PASS	14:30:30	Guard Tail Guard p25 guard-off pre-event target seek: 5.48 dB (expected >= 1.00 dB)
PASS	14:30:30	Guard Tail Guard median target-seek floor ratio: 1.00 (expected >= 0.75)
PASS	14:30:30	Guard Tail Guard p25 target-seek floor ratio: 0.95 (expected >= 0.50)
PASS	14:30:30	Guard Tail Guard under-leveling window rate: 0.0% (expected <= 20.0%)
PASS	14:30:30	Guard Tail Guard median target-error increase: 0.00 dB (expected <= 0.75 dB)
PASS	14:30:30	Guard Tail Guard p90 target-error increase: 0.00 dB (expected <= 1.50 dB)
PASS	14:30:30	Guard Tail Guard dry metrics: median ratio=0.90, p25 ratio=0.83, median error=1.28 dB, seek floor=1.00, under-leveling=0.0%
PASS	14:30:30	Guard Traditional (look-ahead) Tail Guard fixed config: tail-w1250-p40