http://andalusianguitars.com/FS1929-10-spruce-mahoganyb-mahoganyf-brazmahogany-ynat-1.html


^Ex.1/ 00:01 solo 1 (Tanguillo)
Ex.2/ 00:39 solo 2 (David by John Mc.Laughlin)
Ex.3/ 02:15 solo 3 (Almoraima by Paco de Lucia Buleria)
Ex.4/ 05:35 solo 5 (Tanguillo)
Ex.5/ 03:02 topic

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Some facts about the history of Simplicio

References to the history of the double sound hole on the top
Guitar made around 1929 by Francisco Simplicio
http://www.themomi.org/museum/mfa/popular_guitars/1929-30_F_Simplicio.html
Simplicio noticed a disadvantage of the traditional sound hole position in
the weakening of the guitar top in a crucial area and also in a reduction
of the sound emitting surface of the top (Huber, J.: The Development of
the Modern Guitar, Westport, 1994, p.27). The increased sound emitting
surface should also improve the sound emitting in the bass range (Stark,
D.: Diplomarbeit – Entwurf und Bau einer Konzertgitarre mit doppelter
Decke in Sandwichbauweise, Weimar, 2006, p.6)

Impact on the sound:

Omitting the sound hole or positioning it on both sides of the fingerboard
leads to an enlarged vibrating surface of the top. Cue to the ratio
between top length or width and top thickness, it is possible to:

– attain the same degree of flexibility of the top as in a traditional
guitar, but obtaining a higher mass of the top (this leads to a better
sustain without the loss of attack and responsiveness)

– attain a more flexible top than on a traditional guitar, but maintaining
the same mass of the top (this leads to increased loudness and
responsiveness without the loss of sustain).

In addition, the Helmholtz frequency
http://polettipiano.com/Pages/airresengpaul.html
can be lowered significantly, which in turn has an impact on the tonal
character of the instrument.

21 features out of the box on AG Simplicio
https://youtu.be/LaZ4mcFKtVQ?t=2m

Three-dimensional sound
https://youtu.be/yp15_iiIK5U?t=18s


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New Simplicio 1929 Deep Blanca of Brazilian Mahogany with zero fret https://youtu.be/NQcsqJeKJ9k