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Gaspar Sanz (1640–1710) was an Aragonese composer, guitarist, organist and priest born to a wealthy family in Calanda in the comarca of Bajo Aragón, Spain. He studied music, theology and philosophy at the University of Salamanca, where he was later appointed Professor of Music. He wrote three volumes of pedagogical works for the baroque guitar that form an important part of today's classical guitar repertory and have informed modern scholars in the techniques of baroque guitar playing.
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https://en.wikipedia.org/wiki/Gaspar_Sanz
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