Redirect to home after saving

Hi, could someone help me redirect to the main page after you saved the item on the front end?

At controllers.php I found this line:

// Redirect to the list screen.
$this->setMessage(JText::_('COM_PEDIDODEMUSICA_ITEM_SAVED_SUCCESSFULLY'));
$menu = JFactory::getApplication()->getMenu();
$item = $menu->getActive();
$url = (empty($item->link) ? 'index.php?option=com_pedidodemusica&view=pedidos' : $item->link);
$this->setRedirect(JRoute::_($url, false));

I need change to redirect to home. Thank You

it's easy, change $url:
$url="index.php";

Works man.. thankyou! But at the last line i need change to:

$this->setRedirect($url);

I have the same question but concerning backend. Can anybody help me please? (concern task save)

EDIT
SOLVED:

overwrite controller:

public function save($key = null, $urlVar = null)
{
$return = parent::save($key, $urlVar);
$this->setRedirect( JRoute::_( 'index.php' ));
return $return;
}