In the two short years that Pizarro spent in Buenos Aires, he became one third of the Viejas Raíces project alongside local jazz heroes Jorge López Ruiz and Pocho Lapouble, recorded with famed Italian trumpeter Enrico Rava and released his own solo album, Pelo de Rata ("Rat's hair").
Pizarro was no beginner though. Whilst in Chile he had already participated in several music projects and worked as a producer and arranger for the IRT label, and was connected to influential bands such as Los Jaivas and Blops. He had also studied in the Berklee School of Music where he not only met and lived with the cream of an emerging new wave of musicians, but he also had the chance to attend live performances of giants such as Miles Davis or Thelonious Monk.