David Heinemeier HanssonandClaude Opus 5
aa9f0c54c5
Laptop speakers ship voiced by the vendor's Windows DSP layer, which Linux does not get. A tuning restores that as a PipeWire filter-chain in front of the internal speaker sink, matched to the machine by DMI string and expected sink. Adding a laptop is a directory under default/audio/tunings with two files and no new code: matching is data. The XPS 14 DA14260 tuning included here was derived by measuring the xps-audio-linux EasyEffects profile (MIT) and fitting a biquad chain to it, so no impulse response or other upstream asset is redistributed. It measures 1.24 dB RMS against that reference, and matches its dynamic range within 0.1 LU -- the reference's multiband compressor turned out to contribute nothing, so a linear chain replaces it. Bass Q is capped deliberately: a closer magnitude fit swung group delay 31 ms across 63-80 Hz, which smears bass transients. The graph runs as its own PipeWire client under its own config name rather than loading into the audio daemon. The daemon only reads its config at startup, so a daemon-loaded tuning could only be switched by restarting PipeWire -- which drops every PulseAudio client's connection, and applications that do not reconnect (Spotify) then have to be restarted by hand. Hosting it separately also contains failure, since a malformed tuning breaks only that service. Three things about the surrounding audio graph needed fixing for this to behave: - Volume must live downstream of the tuning. omarchy-audio-output-sink is now the single definition of which sink an output's volume really uses, shared by the volume keys, the output switcher's OSD and the audio panel, so they cannot disagree. It resolves the current default output, which keeps it correct when headphones are selected while a tuning exists. - The tuning's own output is a movable sink input, so rerouting "all streams" to a newly selected output would drag the processing onto headphones, or into the tuning's own sink, which is a cycle. It is pinned, and stream moves are limited to streams carrying an application.name. - The physical sink a tuning fronts is not independently selectable, since picking it would only bypass the tuning, so it is kept out of the output list. Applying happens at first-run, not finalize-user, because finalize-user also runs in the ISO chroot where there is no audio server and nothing would retry. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
56 lines
2.0 KiB
Bash
Executable File
56 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# omarchy:summary=Print the sink whose volume and mute a given output really uses
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# omarchy:args=[sink-name]
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# omarchy:group=audio
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# omarchy:examples=omarchy audio output sink | omarchy audio output sink omarchy_speaker_tuning
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set -uo pipefail
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# A DSP sink -- a speaker tuning filter-chain, or EasyEffects -- can be the
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# selected output without being where loudness lives. Changing its volume alters
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# the level going *into* the processing: the display moves while the speakers do
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# not, and on a chain with a compressor or limiter the tone changes too. Resolve
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# through it to the physical sink it feeds.
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#
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# With no argument this resolves the current default output, so when headphones or
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# HDMI are selected it returns those, not the speakers a tuning happens to front.
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# Callers that need to describe some *other* output -- an output switcher naming
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# the next one in the rotation -- pass that sink explicitly.
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sink="${1:-$(pactl get-default-sink 2>/dev/null)}"
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if [[ -z $sink || $sink == alsa_output.* ]]; then
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printf '%s\n' "$sink"
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exit 0
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fi
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# A DSP sink feeds its physical output through a stream of its own; follow that
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# stream down to the sink underneath.
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downstream="$(pactl list sink-inputs 2>/dev/null |
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awk -v virt="$sink" '
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/^Sink Input #/ {target = ""}
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/^[[:space:]]*Sink:/ {target = $2}
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/node\.name = / {
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name = $0
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sub(/.*node\.name = "/, "", name)
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sub(/"$/, "", name)
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if (index(name, virt) == 1 && target != "") {print target; exit}
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}
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/application\.name = "EasyEffects"/ {
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if (virt == "easyeffects_sink" && target != "") {print target; exit}
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}')"
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if [[ -n $downstream ]]; then
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name="$(pactl list sinks short 2>/dev/null |
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awk -v id="$downstream" '$1 == id {print $2; exit}')"
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if [[ -n $name ]]; then
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printf '%s\n' "$name"
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exit 0
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fi
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fi
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# Nothing resolvable downstream -- the DSP sink may simply be idle and unlinked.
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# Fall back to the sink itself so callers still have something to act on.
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printf '%s\n' "$sink"
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