public function hasMyhillProperty() {
		$spectrum = $this->spectrum();
		foreach ($spectrum as $s) {
			if (count($s) != 2) {
				return false;
			}
		}
		return true;
	}
public function hasMyhillProperty() {
		$spectrum = $this->spectrum();
		foreach ($spectrum as $s) {
			if (count($s) != 2) {
				return false;
			}
		}
		return true;
	}
public function hasMyhillProperty ( ) { $ spectrum = $ this -> spectrum ( ) ; foreach ( $ spectrum as $ s ) { if ( count ( $ s ) != 2 ) { return false ; } } return true ; }
Myhill's property is the quality of musical scales or collections with exactly two specific intervals for every generic interval
@see  https://en.wikipedia.org/wiki/Generic_and_specific_intervals
@return boolean [description]
Myhill s property is the quality of musical scales or collections with exactly two specific intervals for every generic interval