he wrote nearly twenty music method books for various instruments -- the violin , cello , bass , flute , recorder , bassoon , harpsichord , harp , mandolin , voice and more -- with titles such as l'art de se perfectionner sur le violon ( the art of playing the violin perfectly ) , le parfait maître à chanter ( the perfect mastersinger ) and l ′ école d ′ orphée ( the school of orpheus ) , a violin treatise describing the french and italian styles .