Capponi began his musical career at a young age and graduated from the Conservatorio di Santa Cecilia in Rome, Italy, with high honours in piano, viola and composition.
In the pop and rock world he has performed live with Angelo Branduardi,[2] Riccardo Cocciante, Richie Havens and Stephen Stills.
Capponi's credits[3] as a film score composer[4] include Voices of Dissent[5] by Carlo Nero, The Fever by Carlo Nero, produced by HBO Films, My House in Umbria by Richard Loncraine, produced by HBO Films, Jane Eyre[6] by Franco Zeffirelli (Miramax), Sparrow[7] by Franco Zeffirelli (CGG), Dio vede e provvede, a miniseries by Enrico Oldoini and P. Costella (LuxVide), Va’ dove ti porta il cuore, by Cristina Comencini (Videa), La fine è nota[8] by Cristina Comencini (RAI 2), Italia-Germania 4-3 by Andrea Barzini (RAI 2), Croce e delizia by Luciano De Crescenzo (Airoldi/DeDionisio), Toscana[9] by Franco Zeffirelli (produced by the Region of Tuscany), Cervellini fritti impanati by Maurizio Zaccaro (IIF), La valle di pietra by Maurizio Zaccaro (PentaFilm), L’Articolo 2 by Maurizio Zaccaro (ReteItalia/Mikado), E non se ne vogliono andare, miniseries by Giorgio Capitani (Clesi), Ma se poi se ne vanno?
[10] Capponi is also composer of music for commercials, having scored the TV advertisements for Telecom Italia, Enel, Alfa Romeo etc.
Continuing a family tradition of luthiers, he founded LIUTALY in 2014, a startup company which designs and manufactures "iV" violins and "iC" cellos that integrate and interact with the most recent technologies, smartphones and tablets, to produce alternative sounds.