## Dell XPS 14 / XPS 16 (2026) internal speakers.
##
## Thirteen biquads and a lookahead limiter, applied as a PipeWire filter-chain
## in front of the internal speaker sink. The stock Linux path already loads
## Dell's Cirrus smart-amplifier firmware; this adds the perceptual voicing the
## Windows Waves layer provides and Linux does not.

description="Dell XPS 14/16 (2026) speakers"
## Matched on the DMI product SKU, which is what Dell keys the Cirrus speaker
## firmware on -- 10280db9 for the XPS 14 and 10280dba for the XPS 16 -- so it
## identifies the speaker hardware itself rather than a marketing name. Compared as
## whole values, so this cannot widen to the rest of the XPS line.
##
##   0DB9  XPS 14 -- measured here, see below
##   0DBA  XPS 16 -- included on report that this profile suits it, not measured
match_sku=("0DB9" "0DBA")
## Unescaped dots: this is passed to awk as a string, where a backslash escape
## would be consumed before the regex sees it.
sink_pattern='^alsa_output.*sof_sdw.*HiFi__Speaker__sink$'

## Provenance. Derived by measuring the response of the xps-clone EasyEffects
## profile from https://github.com/spencerbull/xps-audio-linux (MIT) and fitting
## a biquad chain to it. No upstream asset is redistributed: the convolution
## impulse response is not carried, so this tuning has no binary blob and is
## sample-rate agnostic.
derived_from="xps-audio-linux xps-clone (MIT, spencerbull)"
validated_by="dhh"
validated_on="2026-07-24"
## The measurements below were taken on the XPS 14 (0DB9). The XPS 16 (0DBA) is
## covered on report rather than measurement; re-measure there before treating
## these figures as describing it.
validated_hardware="XPS 14 DA14260 (0DB9)"

## Measured against that reference under a dense pink-weighted multitone of 104
## bin-aligned tones. See docs/audio-tuning.md for how to reproduce these.
magnitude_rms_db="1.24"
bass_group_delay_swing_ms="13.2"
limiter_headroom_db="1.6"   ## worst-case peak on a hot master vs -1 dBFS
dynamic_range_delta_lu="0.1"