Add volume slider

src/AudioPlayer.cpp

@@ -120,6 +120,19 @@ int AudioPlayer::position() const
 	return mediaPlayer->position();
 }
 
+void AudioPlayer::setVolume(int volume)
+{
+	// Convert from 0-100 range to 0.0-1.0 range
+	qreal volumeLevel = static_cast<qreal>(volume) / 100.0;
+	audioOutput->setVolume(volumeLevel);
+}
+
+int AudioPlayer::getVolume() const
+{
+	// Convert from 0.0-1.0 range to 0-100 range
+	return static_cast<int>(audioOutput->volume() * 100);
+}
+
 void AudioPlayer::handlePlaybackStateChanged(QMediaPlayer::PlaybackState state)
 {
 	if (state == QMediaPlayer::PlayingState)

src/AudioPlayer.h

@@ -32,6 +32,8 @@ public:
 	bool isPlaying() const;
 	int duration() const;
 	int position() const;
+	void setVolume(int volume);
+	int getVolume() const;
 
 signals:
 	void playbackStarted();

src/MainWindow.cpp

@@ -54,6 +54,7 @@ MainWindow::MainWindow(QWidget *parent)
 	connect(ui->skipButton, &QPushButton::clicked, this, &MainWindow::onSkipButtonClicked);
 	connect(ui->stopButton, &QPushButton::clicked, this, &MainWindow::onStopButtonClicked);
 	connect(ui->shuffleButton, &QPushButton::clicked, this, &MainWindow::onShuffleButtonClicked);
+	connect(ui->volumeSlider, &QSlider::valueChanged, this, &MainWindow::onVolumeSliderValueChanged);
 	connect(ui->addSongButton, &QPushButton::clicked, this, &MainWindow::onAddSongButtonClicked);
 	connect(ui->removeSongButton, &QPushButton::clicked, this, &MainWindow::onRemoveSongButtonClicked);
 	connect(ui->actionAdvancedSettings, &QAction::triggered, this, &MainWindow::onAdvancedSettingsButtonClicked);
@@ -111,6 +112,9 @@ MainWindow::MainWindow(QWidget *parent)
 
 	currentSong = songModel->getSong(0);
 
+	// Set default volume (50% from UI)
+	audioPlayer->setVolume(ui->volumeSlider->value());
+
 	// Start the worker thread and enter its event loop
 	QObject::connect(&aceThread, &QThread::started, [this]() {qDebug() << "Worker thread started";});
 	aceThread.start();
@@ -161,6 +165,10 @@ void MainWindow::loadSettings()
 	shuffleMode = settings.value("shuffleMode", false).toBool();
 	ui->shuffleButton->setChecked(shuffleMode);
 
+	// Load volume setting
+	int savedVolume = settings.value("volume", 50).toInt();
+	ui->volumeSlider->setValue(savedVolume);
+
 	// Load path settings with defaults based on application directory
 	QString appDir = QCoreApplication::applicationDirPath();
 	qwen3ModelPath = settings.value("qwen3ModelPath",
@@ -189,6 +197,9 @@ void MainWindow::saveSettings()
 	// Save shuffle mode
 	settings.setValue("shuffleMode", shuffleMode);
 
+	// Save volume setting
+	settings.setValue("volume", ui->volumeSlider->value());
+
 	// Save path settings
 	settings.setValue("qwen3ModelPath", qwen3ModelPath);
 	settings.setValue("textEncoderModelPath", textEncoderModelPath);
@@ -548,6 +559,11 @@ void MainWindow::onPositionSliderSliderMoved(int position)
 	}
 }
 
+void MainWindow::onVolumeSliderValueChanged(int value)
+{
+	audioPlayer->setVolume(value);
+}
+
 void MainWindow::ensureSongsInQueue(bool enqeueCurrent)
 {
 	// Only generate more songs if we're playing and not already at capacity

src/MainWindow.h

@@ -73,6 +73,7 @@ private slots:
 	void onStopButtonClicked();
 	void onShuffleButtonClicked();
 	void onPositionSliderSliderMoved(int position);
+	void onVolumeSliderValueChanged(int value);
 	void updatePosition(int position);
 	void updateDuration(int duration);
 	void onAddSongButtonClicked();

src/MainWindow.ui

@@ -223,13 +223,55 @@
         </widget>
        </item>
        <item>
-        <spacer name="horizontalSpacer_2">
+        <spacer name="horizontalSpacer_3">
          <property name="orientation">
           <enum>Qt::Orientation::Horizontal</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
-           <width>40</width>
+           <width>15</width>
+           <height>20</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+       <item>
+        <widget class="QLabel" name="volumeLabel">
+         <property name="text">
+          <string>Volume:</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QSlider" name="volumeSlider">
+         <property name="minimumSize">
+          <size>
+           <width>100</width>
+           <height>20</height>
+          </size>
+         </property>
+         <property name="maximum">
+          <number>100</number>
+         </property>
+         <property name="value">
+          <number>50</number>
+         </property>
+         <property name="orientation">
+          <enum>Qt::Orientation::Horizontal</enum>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <spacer name="horizontalSpacer_2">
+         <property name="orientation">
+          <enum>Qt::Orientation::Horizontal</enum>
+         </property>
+         <property name="sizeType">
+          <enum>QSizePolicy::Policy::Fixed</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>35</width>
            <height>20</height>
           </size>
          </property>