The orchestra’s archives hold about 900 scores.  These include pieces originally composed for plectrum ensembles as well as transcriptions, many by Alberto Bocci, the founding member whose enduring passion in life was the orchestra, which he also conducted for years.

The music dates back to the renaissance (Arcadelt, Galilei), and continues through the baroque (Vivaldi, Händel, Albinoni), classical (Mozart, Beethoven), and  romantic periods -- including opera music -- (Verdi, Rossini, Puccini, Dvorak) up to the present (Prokofiev, Stravinski, Prenna, Wolki, Hattori, Takei).

Currently the conductor is Giuseppe Baldesi.

The Festival, patronized by Monte dei Paschi di Siena with the support of Comune di Siena, Comune di Colle di Val d'Elsa, Complesso museale del Santa Maria della Scala and the Soprintendenza, is the first international event of the Orchestra a Plettro Senese "Alberto Bocci" and the first competition trepick notes dedicated to young talent.