diff --git a/.github/workflows/build-android.yml b/.github/workflows/build-android.yml
index 6b20903..994bc6e 100644
--- a/.github/workflows/build-android.yml
+++ b/.github/workflows/build-android.yml
@@ -37,7 +37,7 @@ jobs:
           coverage: none
 
       - name: Cache Composer dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: vendor
           key: ${{ runner.os }}-composer-no-dev-${{ hashFiles('composer.lock') }}
@@ -48,7 +48,7 @@ jobs:
         run: composer install --no-dev --no-interaction --prefer-dist --optimize-autoloader
 
       - name: Cache npm dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: node_modules
           key: ${{ runner.os }}-npm-${{ hashFiles('package-lock.json') }}
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index b9f8d96..1b27875 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -22,7 +22,7 @@ jobs:
         run: composer update nbucic/audio-tts --no-install --no-interaction --quiet --no-scripts
 
       - name: Cache Composer dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v6
         with:
           path: vendor
           key: ${{ runner.os }}-composer-${{ hashFiles('composer.lock') }}
diff --git a/app/Livewire/Settings.php b/app/Livewire/Settings.php
index 8d04d4e..738aa09 100644
--- a/app/Livewire/Settings.php
+++ b/app/Livewire/Settings.php
@@ -22,7 +22,7 @@ class Settings extends Component
 
     public string $soundMode = 'beep';
 
-    public float $volume = 0.8;
+    public float $volume = 1.0;
 
     public bool $keepScreenOn = true;
 
diff --git a/app/Models/Setting.php b/app/Models/Setting.php
index 150f541..bc001fb 100644
--- a/app/Models/Setting.php
+++ b/app/Models/Setting.php
@@ -34,7 +34,7 @@ public static function current(): self
             'default_beep_lead_in' => BeepLeadIn::Three,
             'default_end_sound'    => 'triple',
             'sound_mode'           => 'beep',
-            'volume'               => 0.8,
+            'volume'               => 1.0,
             'keep_screen_on'       => true,
         ]);
     }
diff --git a/packages/nbucic/audio-tts/resources/android/AudioTTSFunctions.kt b/packages/nbucic/audio-tts/resources/android/AudioTTSFunctions.kt
index 6efbb22..98d15cc 100644
--- a/packages/nbucic/audio-tts/resources/android/AudioTTSFunctions.kt
+++ b/packages/nbucic/audio-tts/resources/android/AudioTTSFunctions.kt
@@ -67,7 +67,7 @@ private object TTSEngine {
 
         val utteranceId = text.hashCode().toString()
         val params = Bundle().apply {
-            putInt(TextToSpeech.Engine.KEY_PARAM_STREAM, AudioManager.STREAM_MUSIC)
+            putInt(TextToSpeech.Engine.KEY_PARAM_STREAM, AudioManager.STREAM_ALARM)
             putFloat(TextToSpeech.Engine.KEY_PARAM_VOLUME, volume.coerceIn(0f, 1f))
         }
 
diff --git a/resources/js/app.js b/resources/js/app.js
index 35c2c85..cfa5d9a 100644
--- a/resources/js/app.js
+++ b/resources/js/app.js
@@ -8,7 +8,7 @@ document.addEventListener('alpine:init', () => {
         timer: null,
         audio: null,
         soundMode: 'beep',
-        volume: 0.8,
+        volume: 1.0,
         keepScreenOn: true,
         interval: null,
         _wakeLock: null,
@@ -42,11 +42,11 @@ document.addEventListener('alpine:init', () => {
                 if (this.soundMode === 'voice') {
                     const text = this.voiceText(reason);
                     console.log('[TTS] playBeep: reason=' + reason + ', voiceText="' + text + '"');
-                    await audioTTS.speak(text);
+                    await audioTTS.speak(text, this.volume);
                 } else if (reason === 'prepare') {
-                    this.audio.prepareBeep();
-                } else {
                     this.audio.beep();
+                } else {
+                    this.audio.prepareBeep();
                 }
             });
 
@@ -113,7 +113,7 @@ document.addEventListener('alpine:init', () => {
     }));
     Alpine.data('settingsSounds', () => ({
         soundMode: 'beep',
-        volume: 0.8,
+        volume: 1.0,
 
         init() {
             this.soundMode = this.$wire.soundMode;
diff --git a/resources/js/audio.js b/resources/js/audio.js
index 67ef860..eca405e 100644
--- a/resources/js/audio.js
+++ b/resources/js/audio.js
@@ -1,7 +1,7 @@
 /**
  * Audio engine for the interval timer.
  */
-export function initAudio(volume = 0.8) {
+export function initAudio(volume = 1.0) {
     volume = Math.max(0, Math.min(1, volume));
     let ctx = null;
 
@@ -25,7 +25,7 @@ export function initAudio(volume = 0.8) {
 
         osc.type = 'sine';
         osc.frequency.setValueAtTime(freq, start);
-        gain.gain.setValueAtTime(volume * 0.6, start);
+        gain.gain.setValueAtTime(volume, start);
         gain.gain.exponentialRampToValueAtTime(0.001, end);
 
         osc.connect(gain);