protected final MenuContent createContentAudio() {
log.debug("createContentAudio()");
Slider sliderMusic = new Slider(0, 1, 1);
sliderMusic.valueProperty().bindBidirectional(app.getAudioPlayer().globalMusicVolumeProperty());
Text textMusic = getUIFactory().newText(localizedStringProperty("menu.music.volume").concat(": "));
Text percentMusic = getUIFactory().newText("");
percentMusic.textProperty().bind(sliderMusic.valueProperty().multiply(100).asString("%.0f"));
Slider sliderSound = new Slider(0, 1, 1);
sliderSound.valueProperty().bindBidirectional(app.getAudioPlayer().globalSoundVolumeProperty());
Text textSound = getUIFactory().newText(localizedStringProperty("menu.sound.volume").concat(": "));
Text percentSound = getUIFactory().newText("");
percentSound.textProperty().bind(sliderSound.valueProperty().multiply(100).asString("%.0f"));
HBox hboxMusic = new HBox(15, textMusic, sliderMusic, percentMusic);
HBox hboxSound = new HBox(15, textSound, sliderSound, percentSound);
hboxMusic.setAlignment(Pos.CENTER_RIGHT);
hboxSound.setAlignment(Pos.CENTER_RIGHT);
return new MenuContent(hboxMusic, hboxSound);
}