Because qin tablature is so useful , logical , easy , and the fastest way ( once the performer knows how to read the notation ) of learning a piece , it is invaluable to the qin player and can not totally be replaced . Because qin tablature is so useful , logical , easy , and the fastest way ( once the performer knows how to read the notation ) of learning a piece , it is invaluable to the qin player and can not totally be replaced ( just as staff notation can not be replaced for Western instruments , because they developed a notation system that suited the instruments well ) .