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 technique Richard Provost published his first edition of "Classic Guitar Technique" , outlining principles of scale and arpeggio technique based on his study of anatomy to make the 'inherent kinesthetic tendencies' ("our limitations") of the human body work for the player. Rather than working around them, the intention being production of "a musical, articulated sound within our physical limitations". A second revised edition of Provost's work (detailing further the author's theory), was published in 1992. The basis of this technique is referred to by Charles Duncan in his book "The Art of Classical Guitar Playing" as "the awareness of the release