In the 1880s, Vasily Vasilievich Andreyev, who was then a professional violinist in the music salons of St Petersburg, developed what became the standardized balalaika, with the assistance of violin maker V. Ivanov. The instrument began to be used in his concert performances. A few years later, St. Petersburg craftsman Paserbsky further refined the instruments by adding a fully chromatic set of frets and also a number of balalaikas in orchestral sizes with the tunings now found in modern instruments. Andreyev patented the design and arranged numerous traditional Russian folk melodies for the orchestra. He also composed a body of concert pieces for the instrument.