Rafael Padron, Johan Nebb, Rene Gonzalez and David Skantar are all incredible guitarists and good friends in real life.
Johan Nebb had to step into the lead role of Rick D'Angelo and learned the role and all of the guitar parts in eight days.
Rene Gonzalez recommended Rafael Padron for role of Fernando Sor after meeting him, hearing him play and seeing his long hair and resemblance to Fernando.
Muriel Urquidi stepped into the role of "Julia" the day before filming,learning the role, the song and how to play the harp parts all in one day.