The WeaveSignal contributors
466b32ab6a
The first public release. What it does: https://weavesignal.top; what changed: CHANGELOG.md.
31 lines
1.4 KiB
Text
31 lines
1.4 KiB
Text
# SPDX-License-Identifier: AGPL-3.0-only
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# SPDX-FileCopyrightText: 2026 The WeaveSignal contributors
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#
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# Playout's processing chain, checked on tones (playout/chain.liq, the chain that plays, at its
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# defaults): a quiet one is brought up and a loud one down towards
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# -16 LUFS, within the 6 dB limit; one already at the target is left alone; one under the
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# threshold is not pumped up; and what comes out never passes the limiter's -1.5 dBFS. Exits 0
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# when all six hold, 1 when one does not. `just liq-check` runs it, two minutes of
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# tone each, in a few seconds.
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%include "probe.liq"
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settings.frame.audio.samplerate := 48000
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settings.log.stdout := true
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settings.log.level := 2
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# A 1 kHz sine, the same in both channels, has the loudness of its level in dBFS (20 log10 of
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# its amplitude) in LUFS; the output must sit within half a dB of where the chain should take it.
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def tone(name, amplitude, expected_lufs) =
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probe(
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name,
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amplify(amplitude, sine(1000.)),
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120.,
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fun (lufs, peak_db, _) -> abs(lufs - expected_lufs) < 0.5 and peak_db <= -1.5
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)
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end
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tone("-40 LUFS in: raised by the 6 dB limit", 0.01, -34.)
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tone("-16 LUFS in: left alone", 0.1585, -16.)
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tone("-12 LUFS in: brought down to the target", 0.2512, -16.)
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tone("-8 LUFS in: lowered by the 6 dB limit", 0.3981, -14.)
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tone("-1 LUFS in: lowered by the 6 dB limit", 0.9, -7.)
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tone("-66 LUFS in, under the threshold: not pumped up", 0.0005, -66.)
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