Classical guitar for repertoire of all periods is sometimes critically viewed: Torres and post-Torres style modern guitars (with their fan-bracing and design) have a thick and strong tone, very suitable for modern-era repertoire. However, they are considered to emphasize the fundamental too heavily (at the expense of overtone partials) for earlier repertoire (Classical/Romantic: Carulli, Sor, Giuliani, Mertz, ...; Baroque: de Visee, ...; etc.). "Andrés Segovia presented the Spanish guitar as a versatile model for all playing styles" to the extent, that still today, "many guitarists have tunnel-vision of the world of the guitar, coming from the modern Segovia tradition". While fan-braced modern
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