Mario Stefano Pietrodarchi was born in Atessa on December 26th 1980. He began studying the accordion at the age of nine before switching to the bandoneon later. From 1993 to 2001,he studied at the F. Fenaroli Civic Music school in Lanciano with M° C. Calista and with M° Cesare Chiacchiaretta.In 2007, he graduated with honours from Santa Cecilia Academy of Music in Rome. He has attended master classes in Italy and abroad with J. Mornet, W. Zubitsky, A. L. Castaño, C. Rossi, Y. Shishkin, and M. Pitocco among others. A brilliant performer with refined musicality, he has won many national and international competitions.
In 2001, he won the World Trophy C.M.A. (Senior) in Lorient, France (21st-24th September).
In June 2002, he was a guest at the "Premio Barocco" - broadcast live from Gallipoli on Rai1 – and performed with the famous singer Antonella Ruggiero.
On 25th May 2009, he played at the Colosseo (Rome) with M° Andrea Bocelli, Angela Gheorghiu, Andrea Griminelli and the Abruzzo Symphony Orchestra. The event “L’alba separadalla luce l’ombra” was in aid of the earthquake victims of Abruzzo. It was exclusively broadcast worldwide on RAI 1 and RAI SAT.
On December 25th 2010, he performed with the Orchestra Giovanile Italiana in Concerto per la Vita e per la Pace(Concert for Life and Peace), worldwide broadcast by RAI in Bethlehem.
On June 1st 2011, he performed at the Arena of Verona together with Erwin Schrott during the festivities for the 150th anniversary of the Italian unification. The show was broadcast live by Rai 1. Together with Erwin Schrott and Anna Netrebeko, he performed in the most important cities in Germany, England and Denmark in 2012. In the same year, he recorded the DVD "Live in Portofino" on a guest appearance with Andrea Bocelli. In 2013, he performed on a guest appearance with Andrea Bocelli, Riccardo Cocciante, Pino Daniele and Simona Molinari at the event "Teatro del Silenzio". On February 22 2014, he performed at the Ulker Sports Arena in Istanbul together with Andrea Bocelli.
Apart from frequently performing in Italy, he has been giving concerts in England, France, Belgium, Croatia, Serbia, Germany, the U.S.A., Poland, Portugal, Finland, Switzerland, Hungary, Canada, Armenia, Russia, Bosnia Herzegovina, Bulgaria, Turkia, Libano, Belarus and China.