System default on macOS is the CoreAudio exclusive backend: with
`exclusive_mode` set, qbz-audio takes Hog Mode, pins the device and switches
its nominal rate to the track (PR #391, shipped in 1.2.11 and never removed).
The Tauri settings gated the toggle on `ALSA || (macos && SystemDefault)`;
the Slint port copied only the ALSA half, and fc0d35e29 then hid the row on
macOS on the premise that no backend there could honour it. So 2.0.x showed
a grey row and 2.1.0 none, while the DB flag still engaged Hog Mode.
- SettingsDoc publishes `backendIsCoreAudio` (macOS && System default); the
row is visible and enabled on it. Linux and Windows are unchanged.
- The backend-switch cascade goes through one predicate
(`output_labels::backend_honours_exclusive`), so re-selecting Auto or
System default on macOS no longer clears the flag.
- The output LED reads EXCL on macOS System default + exclusive_mode instead
of DEFAULT while the device is hogged.
- Node test `scripts/test_qt_exclusive_gate.mjs` evaluates the row's real
gate expressions across platforms; added to qt-runtime-gate.sh. Rust tests
cover the predicate, the LED and the serde name QML reads.
Verified by smoke on the Mac mini with a USB DAC: the row appears, Hog Mode
is acquired, and browser audio moves to the built-in speakers while QBZ
plays. qbz-qt suite 782/782 on Linux; 13/13 with cfg(macos) on the Mac.
cc
Integrate the Kiosk profile hardening round: 12 dedicated Kiosk views plus
22 shared opt-in hosts, shared navigation history with Back/Forward, Albums
as the default library tab, native paged Local Library (artists/tracks),
lightweight MyQBZ grid and detail, Ephemeral lifecycle, bounded lists and
artwork sized to the physical frame, static skeletons, 64px transport bar,
Settings touch reflow and a persistent Immersive exit.
Desktop keeps its prior behavior: every shared component defaults to the
desktop path and only opts into Kiosk behavior through explicit properties
(origin-relative ScrollMemory, viewport-bounded artwork requests).
Regression coverage: kiosk navigation and artwork Node tests added to the
runtime gate, scroll-origin fixtures for fixed and grouped rows, i18n
strings for all eight locales.
Verified by 750 release tests, six QML audits, Kiosk smokes at 800x480 and
1280x800 and a Desktop A/B with seven pixel-identical captures.
cc
Add random access for DSF, DFF, and SACD demuxers, replace live DoP/native sources without releasing ALSA, and expose seek through Qt, MPRIS, and the daemon API.
cx
Add capability-aware enablement, exact control selection, diagnostics, live volume synchronization, and translated unsupported-state feedback to the Qt settings surface.
cx
Three settings and menu entries offered Windows something no code behind them
could do.
DSD playback was opened to WASAPI in fc0d35e29, written before the phase B
spike. The spike then measured this DAC refusing 176400, the DSD64 DoP
carrier, so DoP over exclusive mode lost its target; and both non-convert
modes are cfg(target_os = "linux") in the audio thread and answer "DoP
playback is Linux-only" with a stream error. The row could only offer two ways
to fail. Back to ALSA-only. DSD still plays on Windows, converted to PCM.
Exclusive mode became visible the moment phase B published backendIsWasapi,
but the selection arm keys on backend_type == WasapiExclusive and never reads
exclusive_mode. A live toggle that changes nothing, directly under the
BIT-PERFECT header and directly above the thing being measured.
Open audio CD is dropped on Windows: the CDDA backend is mod unsupported there
and answers NoDrive to everything. Open SACD image stays on every platform --
it opens a file, not a drive, and hiding it would have been a bug.
cc
Adds isWindows, traySupported, systemNotificationsSupported and
rendererSelectable to the settings document, so Settings QML keeps reading
ONE document the way it already does for isMacos. The two any(...) lists
flip to include Windows when plan A-2 T3/T5 land; they point at that line.
Then the Audio tab, measured on the box with the tab open:
HiFi Wizard was live on Windows. qbz-dac-wizard-core generates a
PipeWire/WirePlumber config and knows no other stack, so the wizard cannot
finish anywhere but Linux. Hidden, not disabled - a disabled row invites a
bug report. This is not the reference's backend-is-pipewire gate returning:
inside Linux every backend still sees it, per the 2026-08-11 ruling in that
file's own comment.
Reserve DAC is D-Bus org.freedesktop.ReserveDevice1, Linux only. On Windows
exclusive mode IS the reservation; on macOS it is Hog Mode.
Exclusive mode was visible with no backend able to honour it. It now follows
the backend: Linux unchanged (always visible, enabled only on ALSA), hidden
on macOS, and on Windows it appears when Phase B publishes backendIsWasapi.
QML reads an absent doc property as undefined and undefined === true is
false, so this is correct today and correct again the day the field lands.
The DSD row follows the same pair.
Main.qml no longer boots the wizard off Linux, where its row is hidden and
the audio-stack probe would reach nothing.
Linux sees no change: every gate is isLinux-true or an added || on a field
that is undefined there. Five QML audits pass.
cc
The last unported row of Settings > Audio. Read-only by design: a Hz
dropdown is the documented root-cause trap, because it promises rates the
app cannot request when Qobuz sells four discrete tiers. The value is
Rust-composed from the probe and the row hides on an empty summary; the
fallback caveat renders only when the probe fell back to the common set.
No new msgids -- both strings already exist, translated, in all 8 catalogs.
Six refresh triggers, one more than the reference: startup, the toggle, a
backend switch, an output-device change, reset-to-defaults, and the device
refresh/release button. That last one is Qt-only and the easiest to miss --
it is the hotplug case, where the hardware behind a "System default"
selection changes without the selection changing.
Ordering is persist -> refresh -> publish, and the refresh goes BEFORE
apply_audio rather than merely before the handler's closing publish:
apply_audio publishes on its own way out, an earlier serialize that would
ship a stale summary. The symptom of getting this wrong is a row that is
only right after reopening Settings.
The boot trigger publishes the snapshot itself after awaiting the refresh.
The boot snapshot is spawned separately and can serialize first, which left
the row absent for a user who already had the toggle on until some
unrelated mutation happened to republish.
A cap change drops the tier-keyed audio cache, symmetric with the streaming
-quality change: the cache is quality-blind, so bytes fetched under the old
tier would keep serving and the feature would be inert on anything already
played. The first refresh of a process is exempt -- see the CapChange
classification, which exists because clearing there wiped the disk cache on
every launch.
cc
Six-step modal (Welcome / Check / DACs / Configure / Test / Done) opened
from Settings > Audio. It probes the audio stack and renders per-distro
remediations, enumerates DACs with a manual node.name escape hatch,
generates the PipeWire / WirePlumber snippets to copy, and plays four
tracks spanning 16/44.1 to 24/192 with a live requested-vs-negotiated
read-back. Read-only: it never writes a system file or runs a command.
The logic was unreachable from Qt — every public function in
qbz-dac-wizard takes a &AppWindow and writes straight into Slint globals.
It is lifted into a new frontend-agnostic crate, qbz-dac-wizard-core,
which returns plain data. qbz-dac-wizard itself is left untouched.
Rust owns everything it computes plus `open`, so the reset and the probe
are one act; QML owns the step navigation and the four progress
checkboxes, which is how the reference splits them too.
Two deliberate divergences from the reference: the row sits at the end of
OUTPUT rather than BIT-PERFECT, and it is offered on every backend
instead of PipeWire only — someone on ALSA direct is exactly who needs
the walkthrough.
The green glyphs use the accent tint, not success: success has no qrc bake
directory, so a degraded tint set would render nothing at all. Every
success-toned text keeps theme.success (#3fae6a verbatim).
Verified by 309 tests, both QML audits and the offscreen smoke, plus a
forced-route probe that mounts Settings and walks the wizard's steps —
the standard smoke only mounts Home, so it is no evidence for a modal.
The modal was also driven and screenshotted over VNC.
cc
The pane was written fast and had drifted both ways: four whole sections were
a placeholder reading "not ported to the Qt frontend yet", and what was there
carried rows and copy Slint does not have — an invented custom-theme info row,
made-up "Restart to apply" descriptions, dividers Integrations never had, and
two buttons forked inline instead of using the shared control.
Every section is real now, in Slint's order and grouping, with Slint's labels
and control types: Audio, Playback, Appearance, Offline, Local Library,
Blacklist, Integrations, Developer, and the sandbox section that only appears
on a Flatpak or Snap install. Local Library brings the folder table and the
Plex panel — 856 lines of Slint with no counterpart here until now — wired to
the Plex store that landed earlier this round. Its PIN auth flow is not ported,
so the manual server-url and token path is what this exposes.
The rule the round was run under: a row whose key is not in settings_qt's
dispatch renders and does nothing, so it is either wired or not shipped.
"Share logs" was exactly that — present since the port began, inert — and now
opens the on-disk log.
The directory is per-section files under a thin composition root rather than
one growing file, and the sub-nav's bottom spacer stops being arithmetic over a
hardcoded row count, which broke the moment anyone added a section.
cc
vicrodh