$sonos = new \duncan3dc\Sonos\Network;
$controllers = $sonos->getControllers();
foreach ($controllers as $controller) {
    echo $controller->name . " (" . $controller->room . ")\n";
    echo "\tState: " . $controller->getState() . "\n";
    $controller->play();
}

$sonos = new \duncan3dc\Sonos\Network;
$protest = $sonos->getPlaylistByName("protest the hero");
$progmetal = $sonos->getPlaylistByName("progmetal");

foreach ($protest->getTracks() as $track) {
    $progmetal->addTracks($track["uri"]);
}