Mario Stefano Pietrodarchi was born in Atessa (CH) on December 26th, 1980, when he was 9 years old he began to study Accordion and after Bandoneon. He has attended specialization coursers with: J. Mornet, W. Zubitsky, A.L. Castano, C.Rossi, Y. Shishkin, M. Pitocco.
In 2007 he graduated with honours at the Music Academy “Santa Cecilia” in Rome, Italy.
Brillant performer of refined musicality, he has won lots of national and international competitions among which: 1st Prize at the National Competition "Città di Latina" ( 1995,1996,1997); 1st Prize at the National Competition "Città di Montese” (MO) (1997); 1st Prize at the International Competition "S.Bizzarri of Morro D' Oro” (TE) cat. Junior (1997); Best Italian at the International Competition "Castelfidardo" cat. Junior (1997); In July (1998) he was selected to represent Italy at the WORLD TROPHY C.M.A. (Junior) in Recoaro Terme, (Italy); 1st Prize "ADAMO VOLPI" at the Competition "Città di Loreto” (AN) (2000); 1st Prize at the National Competition "Città di Rieti” (MO) (1999);
In July 2000 he was chosen to represent Italy at the World Trophy C.M.A. (senior) held in Alcobaca (Portugal) winning the 2nd prize. In 2001 he was the winner at the World Trophy C.M.A. (senior) in Lorient (France) (21-24 September). From 2001 to 2003 he carried on a theatre activity together with the actress Daniela Scarlatti.
In June 2002 he was invited as a guest to "Premio Barocco", broadcasted live on Rai1 from Gallipoli, playing for the famous singer Antonella Ruggiero.
In October 2003-2004-2005 he played as a soloist in concerts with the Italian International Orchestra in China and Korea.
In 2005 he collaborated with the Teatro dell’Opera of Rome and the Opera and Symphonic Foundation “Petruzzelli” of Bari for the staging of the Opera “Ascesa e Caduta della Città di Mahagonny”' by Kurt Weill, under the direction of J. Webb.
In July 2006 he participated – together with P. Tonolo e G. Mirabassi – in the 27th edition of the Montreal Jazz Festival in the project “I Colori del Mare” with original compositions by E. Blatti. In January 2008 he recorded the Soundtrack of the Film “Caos Calmo” by Anronello Grimaldi, starring Nanni Moretti, music by Paolo Buonvino.
In 2008 he performed as a Bandoneonist at the 58°th edition of San Remo Festival.
Besides the imposing activity as a concert artist in Italy, he performed in England, France, Belgium, Croatia, Serbia, Germany, U.S.A., Portugal, Finland, Switzerland, Canada, Armenia, Russia and China.