About 1726 Cristofori introduces a new element in his pianos, the system "a corda" that remains until our days. It was based on the possibility of allowing to the performer by means of a special command to displace the mechanism in such a way that every hammer beats on a minor quantity of ropes of what it usually does to achieve a very soft sound. In the current modern pianos "a corda" allows the hammer of the piano to beat on only a rope of every group.

The first specific compositions for pianos do his appearance in 1732. There are the famous 12 sonatas for Giustini piano.

Juan Sebastián Bach takes I contact for the first time with a piano about the year 1750. The piano was constructed by Gottfried Silbermann who was constructing pianos from 1725.

East was a builder of organs of the city of Freiberg, in Saxony. It took contact with the Cristofori piano towards ends of the 20s what moved to construct it their own ones. Bach got in touch with him and asked him the mechanism to cheer up and to reinforce the volume of the sound in the eighth top ones. Silbermann specified the order what produced that Bach was turning into Sales agent of these pianos.

From the workshop of Gottfried Silbermann there developed the famous schools of construction of pianos known as the "German School" and the "English school".

Two disciples of Silbermann called Johannes Zumpe y Americus Backers emigrated to London where they developed a piano that was possessing the same mechanism as that of Cristofori although with notable modifications. This evolved mechanism was later it was called "an English Mechanism".

Another disciple of Silbermann called Stein, perhaps the most notable of them, realized other variants to the original mechanism of a designer called Schroter. This mechanism was the one that later was known as "a German or Viennese Mechanism".

Between the year 1760 to 1830 there was a big expansion in the pianos construction. In 1762 the first piano concert takes place in the whole history realized by Henry Walsh in Dublin. The square piano, a special variant of the grand piano, does his début in 1776 for construction of Sebastián Erard.

In 1773 there publish them famous sonatas for piano Opus 2 of Muzio Clementi that try to use to the maximum the resources of the piano. In 1775 the first piano is constructed in the United States of America in a factory installed in Philadelphia.

In 1795 it develops in London in the first vertical piano. His designer was William Stodart.

In 1808 Sebastián Erard, a French designer of pianos of German origin, patents his famous mechanism of simple repetition and presents the agrafe that was allowing to remain to the ropes in his exact place after the blow of hammer. In 1810 Sebastián designs the pedals mechanism as it comes until our days. In 1822 it introduces his mechanism of double repetition that was allowing a big repetition speed between his keys.

In the year 1828 Ignaz Bösendorfer founds his factory in Austria. These pianos are at present between most emphasized from the world. The year 1853 marks a milestone as for formation of factories of pianos that today are of fame. The German Heinrich Steinweg emigrates to the United States of America and founds Steinway and Sons in New York. Julius Blüthner founds his factory in Leipzig and Carl Bechstein does his in Berlin.

In 1863 Steinway designs and constructs the modern vertical piano with crossed ropes and only one harmonic table. In 1874 he perfects the pedal Sostenuto. In the same year J. Blüthner patents his famous system aliquot that increases the resonance of the ropes on having introduced the fourth additional rope to every group of three, although higher. This rope is not percutida for the hammer but it vibrates in friendliness.

In 1880 Steinway opens a division in Hamburg beginning to compete on the European market with his two strong opponents: Bechstein and Blüthner.