Speech settings updated, no large decimals for settings. Also changing with quick settings keys now applies across window changes.

README.md

@@ -53,6 +53,13 @@ Native X11 grab-window regression:
 
 ## Speech preferences
 
+Use Cthulhu+Left/Right to select a quick speech setting and Cthulhu+Up/Down
+to adjust it. These changes follow you across windows, including application
+profiles, for the current session. Cthulhu+Control+Shift+S saves the choices to
+the global profile. Switching windows does not save or discard them. Applying
+preferences replaces the temporary quick speech choices; restarting discards
+unsaved changes. Saved application overrides still apply on the next startup.
+
 Speech preferences let you adjust rate, pitch and volume directly, without
 first disabling a default checkbox. Unconfigured values display Speech
 Dispatcher's defaults when available, or rate 50, pitch 5 and volume 5.

distro-packages/Arch-Linux/cthulhu-git/PKGBUILD

@@ -4,7 +4,7 @@
 pkgbase=cthulhu-git
 pkgname=cthulhu-git
 _pkgname=cthulhu
-pkgver=2026.10.25.r562.gf035287
+pkgver=2026.10.25.r566.g7ae2801
 pkgrel=1
 pkgdesc="Desktop-agnostic screen reader with speech, Braille, and Tentacle support"
 url="https://git.stormux.org/storm/cthulhu"

docs/testing/speech-preferences.md

@@ -41,3 +41,9 @@ ordinary speech returns to its normal pitch, and Tab/Shift+Tab retain sensible
 labels and values. Check Braille if used. These checks also cover existing
 profiles with explicit values; the automated harness does not establish audible
 speech, physical input or physical Braille acceptance.
+
+Speech numbers use at most one decimal place. After repeated slider changes,
+check pitch and volume with the quick speech keys, then save and reopen the
+settings. Values such as 4.5 must remain 4.5 in announcements and TOML rather
+than exposing floating-point tails. Check all voice types and custom key echo;
+untouched inherited values must remain unset.

internal/app/preferences.go

@@ -46,6 +46,7 @@ type preferencesWorker struct {
 	settings            config.Settings
 	globalSettings      config.Settings
 	appSettings         map[string]config.Settings
+	quickSpeech         quickSpeechSettings
 	activeApp           string
 	editApp             string
 	editing             config.Settings

internal/app/preferences_application.go

@@ -13,7 +13,7 @@ import (
 
 func (worker *preferencesWorker) applicationSettings(application string) (config.Settings, error) {
 	if settings, ok := worker.appSettings[application]; ok {
-		return settings, nil
+		return worker.quickSpeech.apply(settings), nil
 	}
 	store, err := config.NewStore(worker.globalSettings.Path)
 	if err != nil {
@@ -32,7 +32,7 @@ func (worker *preferencesWorker) applicationSettings(application string) (config
 	}
 	settings = config.RebaseApplicationSettings(persistedGlobal, worker.globalSettings, settings)
 	worker.appSettings[application] = settings
-	return settings, nil
+	return worker.quickSpeech.apply(settings), nil
 }
 
 func (worker *preferencesWorker) switchApplication(ctx context.Context, application string) {

internal/app/preferences_application_test.go

@@ -70,8 +70,8 @@ func TestApplicationPreferencesSwitchAndPersistIndependently(t *testing.T) {
 	if err != nil || !mapped || appLoaded.TimeFormat != "24-hour" || appLoaded.DateFormat != "numbers-mdy" || appLoaded.DefaultVoice.Rate == nil || !appLoaded.Reading.AutomaticallyReadClipboardChanges {
 		t.Fatalf("application profile not saved: %+v, %t, %v", appLoaded, mapped, err)
 	}
-	if loaded.DefaultVoice.Rate != nil || loaded.Reading.AutomaticallyReadClipboardChanges {
-		t.Fatal("application speech shortcut overwrote global voice")
+	if loaded.DefaultVoice.Rate == nil || *loaded.DefaultVoice.Rate != 51 || loaded.Reading.AutomaticallyReadClipboardChanges {
+		t.Fatal("speech shortcut did not save globally or leaked unrelated application settings")
 	}
 	restarted := newPreferencesWorker(slog.New(slog.DiscardHandler), loaded,
 		settingsUpdateFunc(func(context.Context, speech.Settings) error { return nil }))

internal/app/preferences_apply.go

@@ -68,6 +68,10 @@ func (worker *preferencesWorker) applyNext(ctx context.Context, next config.Sett
 	if err := worker.applyRuntime(ctx, next); err != nil {
 		return worker.response(err.Error(), false)
 	}
+	// An explicit preferences Apply replaces the session's quick speech choices.
+	if worker.editingActive {
+		worker.quickSpeech = quickSpeechSettings{}
+	}
 	if worker.editingActive {
 		worker.editing = next
 	}

internal/app/speech_settings.go

@@ -47,13 +47,9 @@ func (worker *preferencesWorker) handleSpeechCommand(ctx context.Context, comman
 	ctx, cancel := context.WithTimeout(ctx, 6*time.Second)
 	defer cancel()
 	if command == input.SaveSpeechSettings {
-		store, err := config.NewStore(worker.settings.Path)
+		store, err := config.NewStore(worker.globalSettings.Path)
 		if err == nil {
-			if worker.activeApp != "" {
-				err = store.SaveForApplication(worker.activeApp, worker.settings)
-			} else {
-				err = store.Save(worker.settings)
-			}
+			err = store.Save(worker.globalSettings)
 		}
 		if err != nil {
 			worker.logger.Warn("save speech settings", "error", err)
@@ -115,7 +111,7 @@ func (worker *preferencesWorker) handleSpeechCommand(ctx context.Context, comman
 		field := fields[worker.speechSetting]
 		value := defaults[worker.speechSetting]
 		if *field != nil {
-			value = **field
+			value = math.Round(**field*10) / 10
 		}
 		if adjust {
 			value = math.Round((value+float64(delta)*steps[worker.speechSetting])*10) / 10
@@ -227,6 +223,13 @@ func (worker *preferencesWorker) handleSpeechCommand(ctx context.Context, comman
 			value := tentaclewire.SpeechFromSettings(next)
 			worker.speechOverride = &value
 		} else {
+			worker.quickSpeech.settings = next
+			worker.quickSpeech.adjusted[worker.speechSetting] = true
+			global := copyQuickSpeechSetting(worker.globalSettings, next, worker.speechSetting)
+			for application, settings := range worker.appSettings {
+				worker.appSettings[application] = config.RebaseApplicationSettings(worker.globalSettings, global, settings)
+			}
+			worker.globalSettings = global
 			worker.settings = next
 		}
 		if worker.live != nil {
@@ -236,6 +239,43 @@ func (worker *preferencesWorker) handleSpeechCommand(ctx context.Context, comman
 	worker.announceSpeechSetting(message)
 }
 
+// The preferences worker owns these session-only choices. Apply them after
+// resolving an application profile so window switches cannot undo a shortcut.
+// Explicit preferences Apply or reader exit ends this override; saving does not.
+type quickSpeechSettings struct {
+	settings config.Settings
+	adjusted [5]bool
+}
+
+func (quick quickSpeechSettings) apply(settings config.Settings) config.Settings {
+	for index, adjusted := range quick.adjusted {
+		if adjusted {
+			settings = copyQuickSpeechSetting(settings, quick.settings, index)
+		}
+	}
+	return settings
+}
+
+func copyQuickSpeechSetting(target, source config.Settings, index int) config.Settings {
+	switch index {
+	case 0:
+		target.DefaultVoice.Rate = source.DefaultVoice.Rate
+	case 1:
+		target.DefaultVoice.AveragePitch = source.DefaultVoice.AveragePitch
+	case 2:
+		target.DefaultVoice.Gain = source.DefaultVoice.Gain
+	case 3, 4:
+		// A voice belongs to its synthesizer, and a hardware synthesizer also
+		// needs its transport. Keep this selection valid across app profiles.
+		target.SpeechServerFactory = source.SpeechServerFactory
+		target.SpeechOutputModule = source.SpeechOutputModule
+		target.HardwareSpeechDevice = source.HardwareSpeechDevice
+		target.HardwareSpeechBaudRate = source.HardwareSpeechBaudRate
+		target.DefaultVoice.Family = source.DefaultVoice.Family
+	}
+	return target
+}
+
 // Keep eSpeak NG's language/variant cross product manageable in quick settings.
 // Prefer an exact dialect, then a language-only voice if that dialect is absent.
 // Unknown languages retain the catalog so the user can still select a voice.

internal/app/speech_settings_test.go

@@ -7,11 +7,14 @@ import (
 	"context"
 	"errors"
 	"log/slog"
+	"os"
 	"path/filepath"
+	"reflect"
 	"testing"
 
 	"git.stormux.org/storm/cthulhu/internal/config"
 	"git.stormux.org/storm/cthulhu/internal/input"
+	"git.stormux.org/storm/cthulhu/internal/preferences"
 	"git.stormux.org/storm/cthulhu/internal/speech"
 )
 
@@ -80,6 +83,7 @@ func TestSpeechShortcutsApplySaveAndFailure(t *testing.T) {
 		t.Fatalf("saved settings did not retain speech choices: %+v", saved.DefaultVoice)
 	}
 	worker.settings.Path = t.TempDir()
+	worker.globalSettings.Path = worker.settings.Path
 	command(input.SaveSpeechSettings)
 	if message != "Speech settings could not be saved" {
 		t.Fatal(message)
@@ -91,6 +95,212 @@ func TestSpeechShortcutsApplySaveAndFailure(t *testing.T) {
 	}
 }
 
+func TestQuickSpeechFollowsWindowSwitchesAndSavesGlobally(t *testing.T) {
+	for index, name := range []string{"rate", "pitch", "volume", "synthesizer", "voice"} {
+		t.Run(name, func(t *testing.T) {
+			global := config.DefaultSettings()
+			global.Path = filepath.Join(t.TempDir(), "settings.toml")
+			rate, pitch, gain := 50.0, 5.0, 5.0
+			global.DefaultVoice = config.Voice{Rate: &rate, AveragePitch: &pitch, Gain: &gain,
+				Family: &config.VoiceFamily{Name: "one", Lang: "en"}}
+			global.SpeechOutputModule = "alpha"
+			application := global
+			appRate, appPitch, appGain := 25.0, 2.0, 2.0
+			application.DefaultVoice = config.Voice{Rate: &appRate, AveragePitch: &appPitch, Gain: &appGain,
+				Family: &config.VoiceFamily{Name: "three", Lang: "en"}}
+			application.SpeechOutputModule = "beta"
+			application.TimeFormat = "24-hour"
+			store, err := config.NewStore(global.Path)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if err := store.Save(global); err != nil {
+				t.Fatal(err)
+			}
+			for _, app := range []string{"Cached Application", "New Application"} {
+				if err := store.SaveForApplication(app, application); err != nil {
+					t.Fatal(err)
+				}
+			}
+			original, err := os.ReadFile(global.Path)
+			if err != nil {
+				t.Fatal(err)
+			}
+			var applied speech.Settings
+			worker := newPreferencesWorker(slog.New(slog.DiscardHandler), global,
+				settingsUpdateFunc(func(_ context.Context, next speech.Settings) error { applied = next; return nil }))
+			worker.live = &liveSettings{}
+			worker.live.Store(global)
+			worker.catalog = speech.Catalog{"alpha": {{Name: "one", Language: "en"}, {Name: "two", Language: "en"}},
+				"beta": {{Name: "three", Language: "en"}}}
+			ctx := t.Context()
+			worker.switchApplication(ctx, "Cached Application")
+			worker.switchApplication(ctx, "Presentation")
+			worker.speechSetting = index
+			worker.handleSpeechCommand(ctx, input.IncreaseSpeechSetting)
+			adjusted := worker.settings
+			check := func(base config.Settings) {
+				t.Helper()
+				switch index {
+				case 0:
+					value := 51.0
+					base.DefaultVoice.Rate = &value
+				case 1:
+					value := 5.1
+					base.DefaultVoice.AveragePitch = &value
+				case 2:
+					value := 5.1
+					base.DefaultVoice.Gain = &value
+				case 3:
+					base.SpeechOutputModule = "beta"
+					base.DefaultVoice.Family = &config.VoiceFamily{Name: "three", Lang: "en"}
+				case 4:
+					base.SpeechOutputModule = "alpha"
+					base.DefaultVoice.Family = &config.VoiceFamily{Name: "two", Lang: "en"}
+				}
+				if !reflect.DeepEqual(speechSettingsFromConfig(worker.settings), speechSettingsFromConfig(base)) ||
+					!reflect.DeepEqual(speechSettingsFromConfig(worker.live.Load()), speechSettingsFromConfig(base)) ||
+					!reflect.DeepEqual(applied, speechSettingsFromConfig(base)) {
+					t.Fatalf("speech choice lost in %q: got %+v, want %+v", worker.activeApp, worker.settings.DefaultVoice, base.DefaultVoice)
+				}
+				if worker.settings.TimeFormat != base.TimeFormat {
+					t.Fatal("quick speech changed unrelated application preferences")
+				}
+			}
+			check(global)
+			for _, app := range []string{"Cached Application", "New Application", "Other Application", "Presentation"} {
+				worker.switchApplication(ctx, app)
+				base := global
+				if app == "Cached Application" || app == "New Application" {
+					base = application
+				}
+				check(base)
+			}
+			contents, err := os.ReadFile(global.Path)
+			if err != nil || string(contents) != string(original) {
+				t.Fatalf("unsaved shortcuts wrote settings: %v", err)
+			}
+			// Saving while an application profile is active must update the global
+			// speech choice without copying its other preferences into the default.
+			worker.switchApplication(ctx, "Cached Application")
+			worker.handleSpeechCommand(ctx, input.SaveSpeechSettings)
+			loaded, err := store.Load()
+			if err != nil || !reflect.DeepEqual(speechSettingsFromConfig(loaded), speechSettingsFromConfig(adjusted)) || loaded.TimeFormat != global.TimeFormat {
+				t.Fatalf("global speech settings were not saved: %+v, %v", loaded, err)
+			}
+			appLoaded, mapped, err := store.LoadForApplication("Cached Application")
+			if err != nil || !mapped || !reflect.DeepEqual(speechSettingsFromConfig(appLoaded), speechSettingsFromConfig(application)) {
+				t.Fatalf("save shortcut overwrote application profile: %+v, %v", appLoaded, err)
+			}
+			if _, mapped, err := store.LoadForApplication("Presentation"); err != nil || mapped {
+				t.Fatalf("quick speech created an application profile: %t, %v", mapped, err)
+			}
+			worker.switchApplication(ctx, "Presentation")
+			check(global)
+			worker.switchApplication(ctx, "Cached Application")
+			check(application)
+			restarted := newPreferencesWorker(slog.New(slog.DiscardHandler), loaded,
+				settingsUpdateFunc(func(_ context.Context, next speech.Settings) error { applied = next; return nil }))
+			restarted.switchApplication(ctx, "Presentation")
+			if !reflect.DeepEqual(speechSettingsFromConfig(restarted.settings), speechSettingsFromConfig(adjusted)) {
+				t.Fatal("saved global speech did not survive restart")
+			}
+		})
+	}
+}
+
+func TestQuickSpeechFailureAndPreferencesReplacement(t *testing.T) {
+	global := config.DefaultSettings()
+	global.Path = filepath.Join(t.TempDir(), "settings.toml")
+	rate := 50.0
+	global.DefaultVoice.Rate = &rate
+	var updateError error
+	worker := newPreferencesWorker(slog.New(slog.DiscardHandler), global,
+		settingsUpdateFunc(func(context.Context, speech.Settings) error { return updateError }))
+	application := global
+	appRate := 25.0
+	application.DefaultVoice.Rate = &appRate
+	worker.appSettings["Example Editor"] = application
+	ctx := t.Context()
+	worker.switchApplication(ctx, "Presentation")
+	worker.handleSpeechCommand(ctx, input.IncreaseSpeechSetting)
+	worker.handleSpeechCommand(ctx, input.SelectNextSpeechSetting)
+	worker.handleSpeechCommand(ctx, input.IncreaseSpeechSetting)
+	message := ""
+	worker.announce = func(text string) { message = text }
+	updateError = errors.New("backend unavailable")
+	worker.handleSpeechCommand(ctx, input.IncreaseSpeechSetting)
+	updateError = nil
+	path := worker.globalSettings.Path
+	worker.globalSettings.Path = t.TempDir()
+	worker.handleSpeechCommand(ctx, input.SaveSpeechSettings)
+	if message != "Speech settings could not be saved" {
+		t.Fatal(message)
+	}
+	worker.globalSettings.Path = path
+	worker.switchApplication(ctx, "Example Editor")
+	if *worker.settings.DefaultVoice.Rate != 51 || *worker.settings.DefaultVoice.AveragePitch != 5.1 {
+		t.Fatal("failed adjustment or save lost prior session choices")
+	}
+	if !worker.beginEdit(ctx, "") {
+		t.Fatal("could not open global preferences")
+	}
+	values := preferences.FromSettings(worker.editing)
+	appliedRate := 60.0
+	values.Rate = &appliedRate
+	updateError = errors.New("backend unavailable")
+	if response := worker.apply(ctx, preferences.Request{Values: values}); response.Accepted {
+		t.Fatal("failed preferences apply was accepted")
+	}
+	if settings, err := worker.applicationSettings("Example Editor"); err != nil || *settings.DefaultVoice.Rate != 51 {
+		t.Fatalf("failed preferences apply discarded quick speech: %v", err)
+	}
+	updateError = nil
+	if response := worker.apply(ctx, preferences.Request{Values: values}); !response.Accepted {
+		t.Fatal(response.Message)
+	}
+	if *worker.settings.DefaultVoice.Rate != 25 || *worker.globalSettings.DefaultVoice.Rate != 60 {
+		t.Fatal("explicit preferences apply did not restore application profile ownership")
+	}
+	worker.editingActive = false
+	worker.switchApplication(ctx, "Presentation")
+	if *worker.settings.DefaultVoice.Rate != 60 {
+		t.Fatal("old quick speech choice replaced applied preferences")
+	}
+}
+
+func TestSpeechShortcutReadsAndSavesRoundedNumbers(t *testing.T) {
+	settings := config.DefaultSettings()
+	settings.Path = filepath.Join(t.TempDir(), "settings.toml")
+	rate, pitch, gain := 89.99999999999999, 4.499999999999998, 4.999999999999999
+	settings.DefaultVoice = config.Voice{Rate: &rate, AveragePitch: &pitch, Gain: &gain}
+	worker := newPreferencesWorker(slog.New(slog.DiscardHandler), settings, nil)
+	message := ""
+	worker.announce = func(text string) { message = text }
+	for index, want := range []string{"Rate 90", "Pitch 4.5", "Volume 5"} {
+		command := input.SelectNextSpeechSetting
+		if index == 0 {
+			command = input.SelectPreviousSpeechSetting
+		}
+		worker.handleSpeechCommand(t.Context(), command)
+		if message != want {
+			t.Fatalf("got %q, want %q", message, want)
+		}
+	}
+	if _, err := os.Stat(settings.Path); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("checking speech settings created a file: %v", err)
+	}
+	worker.handleSpeechCommand(t.Context(), input.SaveSpeechSettings)
+	store, err := config.NewStore(settings.Path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	saved, err := store.Load()
+	if err != nil || *saved.DefaultVoice.Rate != 90 || *saved.DefaultVoice.AveragePitch != 4.5 || *saved.DefaultVoice.Gain != 5 {
+		t.Fatalf("speech numbers were not saved rounded: %+v, %v", saved.DefaultVoice, err)
+	}
+}
+
 func TestSpeechShortcutNumericBounds(t *testing.T) {
 	for index, maximum := range []float64{99, 9, 9} {
 		settings := config.DefaultSettings()

internal/config/profile_mapping.go

@@ -56,6 +56,7 @@ func RebaseApplicationSettings(oldGlobal, newGlobal, application Settings) Setti
 }
 
 func profileFromSettings(settings Settings) writableProfile {
+	settings = RoundSpeechValues(settings)
 	return writableProfile{
 		OCR: writableOCR{Language: stringPointer(settings.OCR.Language), Layout: intPointer(settings.OCR.Layout), Scale: intPointer(settings.OCR.Scale), Grayscale: boolPointer(settings.OCR.Grayscale), Invert: boolPointer(settings.OCR.Invert), BlackWhite: boolPointer(settings.OCR.BlackWhite), Threshold: intPointer(settings.OCR.Threshold), AutoRefresh: boolPointer(settings.OCR.AutoRefresh), RefreshInterval: intPointer(settings.OCR.RefreshInterval), ConfirmClick: boolPointer(settings.OCR.ConfirmClick), CopyFirstResult: boolPointer(settings.OCR.CopyFirstResult), AutoReadAll: boolPointer(settings.OCR.AutoReadAll)},
 		ProgressBar: writableProgressBar{

internal/config/voices.go

@@ -4,6 +4,22 @@
 
 package config
 
+import "math"
+
+// RoundSpeechValues keeps speech controls and persisted voices at one decimal
+// place without changing the caller's values or turning inheritance into values.
+func RoundSpeechValues(settings Settings) Settings {
+	for _, voice := range []*Voice{&settings.DefaultVoice, &settings.UppercaseVoice, &settings.HyperlinkVoice, &settings.SystemVoice, &settings.EchoVoice} {
+		for _, field := range []**float64{&voice.Rate, &voice.AveragePitch, &voice.Gain} {
+			if *field != nil {
+				value := math.Round(**field*10) / 10
+				*field = &value
+			}
+		}
+	}
+	return settings
+}
+
 // EffectiveVoice resolves a sparse voice over Default. Uppercase retains the
 // established automatic pitch unless overridden or capital pitch is disabled.
 func EffectiveVoice(settings Settings, kind string) Voice {

internal/config/voices_test.go

@@ -5,11 +5,76 @@
 package config
 
 import (
+	"os"
 	"path/filepath"
 	"reflect"
+	"strings"
 	"testing"
 )
 
+func TestSpeechNumbersPersistWithOneDecimal(t *testing.T) {
+	settings := DefaultSettings()
+	rate, pitch, gain := 61.29999999999999, 4.499999999999998, 4.999999999999999
+	settings.DefaultVoice = Voice{Rate: &rate, AveragePitch: &pitch, Gain: &gain}
+	settings.UppercaseVoice.AveragePitch = &pitch
+	settings.HyperlinkVoice.Rate = &rate
+	settings.SystemVoice.Gain = &gain
+	settings.EchoVoice = settings.DefaultVoice
+	path := filepath.Join(t.TempDir(), "settings.toml")
+	store, err := NewStore(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := store.Save(settings); err != nil {
+		t.Fatal(err)
+	}
+	loaded, err := store.Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for index, voice := range []Voice{loaded.DefaultVoice, loaded.UppercaseVoice, loaded.HyperlinkVoice, loaded.SystemVoice, loaded.EchoVoice} {
+		for field, value := range []*float64{voice.Rate, voice.AveragePitch, voice.Gain} {
+			if value != nil && *value != []float64{61.3, 4.5, 5}[field] {
+				t.Fatalf("voice %d field %d = %g", index, field, *value)
+			}
+		}
+	}
+	if loaded.UppercaseVoice.Rate != nil || loaded.HyperlinkVoice.Gain != nil || loaded.SystemVoice.AveragePitch != nil {
+		t.Fatal("rounding turned inheritance into explicit settings")
+	}
+	if *settings.DefaultVoice.AveragePitch != 4.499999999999998 {
+		t.Fatal("saving mutated caller's voice")
+	}
+	contents, err := os.ReadFile(path)
+	if err != nil || strings.Contains(string(contents), "999999") || !strings.Contains(string(contents), "average-pitch = 4.5") {
+		t.Fatalf("TOML does not contain rounded decimal values: %v", err)
+	}
+	if err := store.SaveForApplication("Example Editor", settings); err != nil {
+		t.Fatal(err)
+	}
+	contents, err = os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	document, _, err := decodeDocument(contents)
+	if err != nil {
+		t.Fatal(err)
+	}
+	profile := document.Profiles[document.Applications["Example Editor"]]
+	if profile.Speech.DefaultVoice != nil || profile.KeyEcho.EchoVoice != nil {
+		t.Fatal("floating-point noise created application voice overrides")
+	}
+	appGain := 3.299999999999999
+	settings.DefaultVoice.Gain = &appGain
+	if err := store.SaveForApplication("Example Editor", settings); err != nil {
+		t.Fatal(err)
+	}
+	application, found, err := store.LoadForApplication("Example Editor")
+	if err != nil || !found || *application.DefaultVoice.Gain != 3.3 {
+		t.Fatalf("application speech was not rounded: %+v, %v", application.DefaultVoice, err)
+	}
+}
+
 func TestVoiceTypesPersistAndInheritAcrossApplications(t *testing.T) {
 	settings := DefaultSettings()
 	rate, pitch, gain := 62.0, 8.0, 4.0

internal/preferences/echo.go

@@ -11,6 +11,7 @@ package preferences
 import "C"
 
 import (
+	"math"
 	"sort"
 	"strings"
 	"unsafe"
@@ -142,7 +143,7 @@ func (session *uiSession) getEchoVoice() (config.Voice, string) {
 		{"echoRateScale", &voice.Rate}, {"echoPitchScale", &voice.AveragePitch}, {"echoVolumeScale", &voice.Gain},
 	} {
 		id := C.CString(item.id)
-		value := float64(C.prefs_number_value(id))
+		value := math.Round(float64(C.prefs_number_value(id))*10) / 10
 		C.free(unsafe.Pointer(id))
 		*item.target = &value
 	}

internal/preferences/protocol_test.go

@@ -5,12 +5,45 @@
 package preferences
 
 import (
+	"math"
 	"reflect"
 	"testing"
 
 	"git.stormux.org/storm/cthulhu/internal/config"
 )
 
+func TestSpeechValuesMergeRoundsNumbersAndPreservesInheritance(t *testing.T) {
+	settings := config.DefaultSettings()
+	values := FromSettings(settings)
+	rate, pitch, gain := 61.29999999999999, 4.499999999999998, 4.999999999999999
+	values.Rate, values.Pitch, values.Volume = &rate, &pitch, &gain
+	values.UppercaseVoice.AveragePitch = &pitch
+	values.HyperlinkVoice.Rate = &rate
+	values.SystemVoice.Gain = &gain
+	values.EchoVoice = config.Voice{Rate: &rate, AveragePitch: &pitch, Gain: &gain}
+	merged, err := values.Merge(settings)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if *merged.DefaultVoice.Rate != 61.3 || *merged.DefaultVoice.AveragePitch != 4.5 || *merged.DefaultVoice.Gain != 5 ||
+		*merged.UppercaseVoice.AveragePitch != 4.5 || *merged.HyperlinkVoice.Rate != 61.3 || *merged.SystemVoice.Gain != 5 ||
+		*merged.EchoVoice.Rate != 61.3 || *merged.EchoVoice.AveragePitch != 4.5 || *merged.EchoVoice.Gain != 5 {
+		t.Fatal("speech values retained floating-point noise")
+	}
+	if merged.UppercaseVoice.Rate != nil || merged.HyperlinkVoice.Gain != nil || merged.SystemVoice.AveragePitch != nil {
+		t.Fatal("rounding turned inheritance into explicit settings")
+	}
+	if pitch != 4.499999999999998 {
+		t.Fatal("merging mutated caller's values")
+	}
+	for _, invalid := range []float64{9.01, -0.01, math.NaN(), math.Inf(1)} {
+		values.Pitch = &invalid
+		if _, err := values.Merge(settings); err == nil {
+			t.Fatalf("rounding hid invalid pitch %g", invalid)
+		}
+	}
+}
+
 func TestSoundValuesDefaultAndMerge(t *testing.T) {
 	settings := config.DefaultSettings()
 	values := FromSettings(settings)

internal/preferences/speech.go

@@ -419,7 +419,7 @@ func (session *uiSession) read_voice_editor() (config.Voice, error) {
 	} {
 		id := C.CString(item.id)
 		edited := C.prefs_number_edited(id) != 0
-		value := float64(C.prefs_number_value(id))
+		value := math.Round(float64(C.prefs_number_value(id))*10) / 10
 		C.free(unsafe.Pointer(id))
 		if !edited {
 			continue

internal/preferences/values.go

@@ -139,5 +139,8 @@ func (values Values) Merge(settings config.Settings) (config.Settings, error) {
 	settings.SayCapForCapitals = values.SayCapForCapitals
 	settings.Reading = values.Reading
 	settings.SpeakDescription = values.SpeakDescription
-	return settings, config.Validate(settings)
+	if err := config.Validate(settings); err != nil {
+		return settings, err
+	}
+	return config.RoundSpeechValues(settings), nil
 }

tests/native_preferences.py

@@ -565,6 +565,7 @@ def inside():
                     values = accept_preview()
                     assert abs(slider.queryValue().currentValue - expected) < 1e-8, (name, arrow, expected)
                     assert abs(values[field] - expected) < 1e-8, (name, arrow, values)
+                    assert values[field] == round(values[field], 1), (name, "precision", values)
                     startValue = expected
                 for bound, arrows in ((0, ("Left", "Down")),
                                       (slider.queryValue().maximumValue, ("Right", "Up"))):
@@ -597,6 +598,7 @@ def inside():
                     wait_for(lambda: abs(slider.queryValue().currentValue - expected) < 1e-8,
                              f"{name}: {arrow} did not produce {expected}")
                     assert abs(values["EchoVoice"][field] - expected) < 1e-8, values
+                    assert values["EchoVoice"][field] == round(values["EchoVoice"][field], 1), (name, "precision", values)
                 finalValue = expected
                 for bound, arrows in ((0, ("Left", "Down")),
                                       (slider.queryValue().maximumValue, ("Right", "Up"))):
@@ -611,8 +613,10 @@ def inside():
             assert applied["Save"], applied
             for field, expected in (("Rate", 49.9), ("Pitch", 4.9), ("Volume", 4.9)):
                 assert abs(applied["Values"][field] - expected) < 1e-8, applied
+                assert applied["Values"][field] == round(applied["Values"][field], 1), applied
             for field, expected in (("Rate", 49.9), ("AveragePitch", 4.9), ("Gain", 4.9)):
                 assert abs(applied["Values"]["EchoVoice"][field] - expected) < 1e-8, applied
+                assert applied["Values"]["EchoVoice"][field] == round(applied["Values"]["EchoVoice"][field], 1), applied
             send(dict(initial, Values=applied["Values"], Message="Speech settings saved."))
             wait_for(lambda: named("Apply").getState().contains(pyatspi.STATE_SENSITIVE), "Apply busy")
             for name, expected in (("Key echo rate", 49.9), ("Key echo pitch", 4.9), ("Key echo volume", 4.9)):