function hemitonics($scale = null) {
		if (is_null($scale)) {
			$scale = $this->scale;
		}
		return $this->findIntervalics(1, $scale);
	}
function hemitonics($scale = null) {
		if (is_null($scale)) {
			$scale = $this->scale;
		}
		return $this->findIntervalics(1, $scale);
	}
function hemitonics ( $ scale = null ) { if ( is_null ( $ scale ) ) { $ scale = $ this -> scale ; } return $ this -> findIntervalics ( 1 , $ scale ) ; }
returns the bits that have a semitone above them
returns the bits that have a semitone above them