Added speed slider. Minor improvements

soundboard.hpp

@@ -24,7 +24,10 @@ private:
     QPushButton* m_refresh_button = nullptr;
     QPushButton* m_folder_button = nullptr;
     QLabel* m_label = nullptr;
+    QLabel* m_volume_label = nullptr;
     QSlider* m_volume_slider = nullptr;
+    QLabel* m_speed_label = nullptr;
+    QSlider* m_speed_slider = nullptr;
     QListWidget* m_sound_list = nullptr;
     QPushButton* m_stop_button = nullptr;
     QCheckBox* m_monitor_toggle = nullptr;
@@ -35,6 +38,7 @@ private:
 
     std::vector<Pipewire::Node> m_apps;
     QString m_audio_directory;
+    float m_speed = 1.0f;
 
     void on_app_selected(int index);
     void refresh_apps();
@@ -42,5 +46,6 @@ private:
     void play_sound();
     void stop_sounds();
     void set_volume(int value);
+    void set_speed(int value);
     void toggle_monitor(Qt::CheckState state);
 };