public static function getFamilies($justTrueScales = true) {
		$allscales = range(0, 4095);
		$modelist= array();
		while (count($allscales) > 0) {
			$s = array_pop($allscales);
			$scale = new Scale($s);
			$modes = $scale->modes();
			if ($scale->isTrueScale()) {
				$modelist[] = $s;
			}
			foreach ($modes as $mode) {
				unset($allscales[$mode]);
			}
		}
		return $modelist;
	}