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+# Sounds Tab Design
+
+Date: 2026-04-05
+
+## Context
+
+Cthulhu currently stores several non-speech sound settings in the general settings file, but the preferences dialog does not present them coherently:
+
+- The General tab contains an inline Sound section for backend, theme, and role-sound presentation.
+- The progress-bar beep checkbox lives in the General tab's progress-bar section.
+- `soundVolume` exists in settings and the user's active profile, but there is no UI control for it.
+- `enableSound`, `playSoundForRole`, `playSoundForState`, `playSoundForPositionInSet`, and `playSoundForValue` exist as persisted settings but are not currently exposed in the dialog.
+- `progressBarBeepInterval` exists in runtime defaults but is not part of the normal persisted general-settings key list.
+
+The result is that sound-related behavior is split across the dialog and some active settings cannot be inspected or changed from the UI.
+
+## Goals
+
+- Add a dedicated `Sounds` preferences tab.
+- Move currently exposed sound-related controls out of `General` and into `Sounds`.
+- Move the progress-bar beep option into `Sounds` while leaving the rest of the progress-bar section in `General`.
+- Expose currently hidden sound-related settings in the UI.
+- Add a UI control for `soundVolume`.
+- Expose and persist `progressBarBeepInterval`.
+- Preserve the existing settings model and save format.
+- Avoid clobbering unrelated settings when saving preferences.
+
+## Non-Goals
+
+- No refactor of the broader preferences architecture.
+- No changes to sound playback implementation outside what is needed to load and save settings correctly.
+- No new settings schema beyond persisting the existing hidden `progressBarBeepInterval`.
+- No dynamic enable/disable logic for sound controls in this pass.
+
+## Design Summary
+
+Add a new notebook page labeled `Sounds` and make it the single home for non-speech sound configuration. Remove the inline Sound frame from `General`. Keep the existing progress-bar speech/braille controls and shared progress-bar behavior controls in `General`, but move beep-specific controls into `Sounds`.
+
+The new tab will use existing settings keys wherever possible and will save through the existing `prefsDict` and settings-manager flow.
+
+## Sounds Tab Layout
+
+The `Sounds` tab will contain three sections.
+
+### Output
+
+- `enableSound` checkbox
+- `soundVolume` slider
+- `soundSink` combo box
+
+`soundVolume` should be represented by a native `GtkScale` and persisted back to the existing floating-point `soundVolume` setting. The control should initialize from `prefsDict.get("soundVolume", settings.soundVolume)`.
+
+For this implementation, the slider should match the stored setting directly rather than introducing a new percentage representation. That keeps the implementation small and avoids conversion-only complexity in a settings path that already exists.
+
+### Presentation
+
+- `soundTheme` combo box
+- `roleSoundPresentation` combo box
+- `playSoundForRole` checkbox
+- `playSoundForState` checkbox
+- `playSoundForPositionInSet` checkbox
+- `playSoundForValue` checkbox
+
+These controls will expose already-existing settings and use the same `prefsDict` update pattern already used by the current dialog.
+
+### Alerts
+
+- `beepProgressBarUpdates` checkbox
+- `progressBarBeepInterval` spin button
+
+This section controls only beep-based progress-bar alerts. The label should make it clear that the interval is beep-specific, not the general progress-bar announcement interval.
+
+## General Tab Changes
+
+Keep these controls in `General`:
+
+- `speakProgressBarUpdates`
+- `brailleProgressBarUpdates`
+- `progressBarUpdateInterval`
+- `progressBarVerbosity`
+- `ignoreStatusBarProgressBars`
+
+Remove these from `General`:
+
+- the inline Sound frame
+- `beepProgressBarUpdates`
+
+This preserves the current organization for general progress-bar announcement behavior while moving sound-only concerns into the new tab.
+
+## Settings and Persistence
+
+### Existing Keys Reused
+
+The new UI will continue to use the existing settings keys:
+
+- `enableSound`
+- `soundVolume`
+- `soundSink`
+- `soundTheme`
+- `roleSoundPresentation`
+- `playSoundForRole`
+- `playSoundForState`
+- `playSoundForPositionInSet`
+- `playSoundForValue`
+- `beepProgressBarUpdates`
+
+### Persisted Hidden Key
+
+Add `progressBarBeepInterval` to the persisted general-settings key list so it round-trips through:
+
+- defaults in `settings.py`
+- settings-manager general settings
+- TOML backend save/load
+- `prefsDict` in the preferences dialog
+
+This avoids the current mismatch where beep interval exists as a runtime default but is not part of the normal persisted general-settings path.
+
+### Save Behavior
+
+The implementation should continue to update individual keys in `prefsDict` and then rely on the existing general-settings save flow. No bulk replacement of the whole settings structure should be introduced.
+
+This is specifically intended to avoid accidental overwrites of unrelated settings already present in `user-settings.toml`.
+
+## Default Values
+
+- Keep `progressBarUpdateInterval = 10` as the default for speech and braille progress-bar updates.
+- Keep `progressBarBeepInterval = 0` as the default for beep-based progress-bar updates.
+- Keep `soundVolume = 0.5` as the existing default unless the user explicitly changes it.
+
+The new UI should reflect these values accurately on load.
+
+## Accessibility
+
+Use native GTK controls and follow the existing preferences-dialog patterns:
+
+- every label must be associated with its control via `mnemonic_widget`
+- checkboxes should use the existing `checkButtonToggled` convention when possible
+- combo boxes should keep proper `label-for` / `labelled-by` relationships
+- no custom-drawn controls
+- no keyboard traps
+
+The new tab should be fully reachable with standard tab navigation.
+
+## Implementation Notes
+
+Expected files to change:
+
+- `src/cthulhu/cthulhu-setup.ui`
+- `src/cthulhu/cthulhu_gui_prefs.py`
+- `src/cthulhu/settings.py`
+
+Implementation should:
+
+- add the new notebook page and move or recreate the relevant widgets there
+- initialize and save the new sound controls using existing dialog patterns
+- add explicit handling for `soundVolume`
+- add explicit handling for `progressBarBeepInterval`
+- keep all unrelated preference behavior unchanged
+
+## Verification
+
+The implementation should be considered complete only after all of the following are checked:
+
+1. The preferences dialog opens and the new `Sounds` tab is present.
+2. Existing sound settings load into the correct controls.
+3. Changing sound settings updates `prefsDict` without breaking unrelated settings.
+4. Saving preferences preserves unrelated keys in `user-settings.toml`.
+5. `progressBarBeepInterval` is written and reloaded correctly.
+6. The General tab still handles speech/braille progress-bar settings correctly.
+7. Touched Python files pass compile checks.
+8. Manual verification confirms keyboard navigation and label association remain intact.