Classical guitar was playing in concerts around the world, popularizing his modern classical guitar, as well as a new style of music in the 1920s: Spanish romantic-modern style with guitar works by Moreno Torroba, de Falla, etc. Some people consider it to have been this influence of Segovia which led to the domination of the Torres instrument. Factories all over the world began producing them in large numbers. It was the 19th century classical guitarist Francisco Tárrega who first popularized the Torres design as a classical solo instrument. Composers of the Renaissance period who wrote for four course guitar include Alonso Mudarra,
Classical guitar also not systematically indicated, but when they are (mostly in the case of the execution of "barrés") these are indicated with Roman numerals from the first position I (index finger of the left hand placed on the 1st fret: F-B flat-E flat-A flat-C-F) to the twelfth position XII (the index finger of the left hand placed on the 12th fret: E-A-D-G-B-E; the 12th fret is placed where the body begins) or even higher up to position XIX (the classical guitar most often having 19 frets, with the 19th fret being most often split and not being usable to fret the