David Heinemeier HanssonandClaude Fable 5
16c8888f96
Task procedure lives in agents/skills/ (migrations.md moves there), system-shape reference in docs/ (AUDIO-TUNING.md renamed to match), end-user documentation in manual/. AGENTS.md now states the split. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
40 lines
2.0 KiB
Plaintext
40 lines
2.0 KiB
Plaintext
## Dell XPS 14 / XPS 16 (2026) internal speakers.
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##
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## Thirteen biquads and a lookahead limiter, applied as a PipeWire filter-chain
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## in front of the internal speaker sink. The stock Linux path already loads
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## Dell's Cirrus smart-amplifier firmware; this adds the perceptual voicing the
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## Windows Waves layer provides and Linux does not.
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description="Dell XPS 14/16 (2026) speakers"
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## Matched on the DMI product SKU, which is what Dell keys the Cirrus speaker
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## firmware on -- 10280db9 for the XPS 14 and 10280dba for the XPS 16 -- so it
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## identifies the speaker hardware itself rather than a marketing name. Compared as
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## whole values, so this cannot widen to the rest of the XPS line.
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##
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## 0DB9 XPS 14 -- measured here, see below
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## 0DBA XPS 16 -- included on report that this profile suits it, not measured
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match_sku=("0DB9" "0DBA")
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## Unescaped dots: this is passed to awk as a string, where a backslash escape
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## would be consumed before the regex sees it.
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sink_pattern='^alsa_output.*sof_sdw.*HiFi__Speaker__sink$'
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## Provenance. Derived by measuring the response of the xps-clone EasyEffects
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## profile from https://github.com/spencerbull/xps-audio-linux (MIT) and fitting
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## a biquad chain to it. No upstream asset is redistributed: the convolution
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## impulse response is not carried, so this tuning has no binary blob and is
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## sample-rate agnostic.
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derived_from="xps-audio-linux xps-clone (MIT, spencerbull)"
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validated_by="dhh"
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validated_on="2026-07-24"
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## The measurements below were taken on the XPS 14 (0DB9). The XPS 16 (0DBA) is
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## covered on report rather than measurement; re-measure there before treating
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## these figures as describing it.
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validated_hardware="XPS 14 DA14260 (0DB9)"
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## Measured against that reference under a dense pink-weighted multitone of 104
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## bin-aligned tones. See docs/audio-tuning.md for how to reproduce these.
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magnitude_rms_db="1.24"
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bass_group_delay_swing_ms="13.2"
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limiter_headroom_db="1.6" ## worst-case peak on a hot master vs -1 dBFS
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dynamic_range_delta_lu="0.1"
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