He received his early musical education from his mother, Ada Estades and aunt, Olga Pierri, on the guitar.
Contemporary composers such as Leo Brouwer, Guido Santórsola, Jacques Hétu, Astor Piazzolla, Abel Carlevaro, Carlo Domeniconi and Terry Riley have written major works for Alvaro Pierri.
He is a frequent collaborator with prominent chamber music figures including Astor Piazzolla, Frank Peter Zimmermann, Ernö Sebastien, Régis Pasquier, Hatto Beyerle, Philippe Müller, Leo Brouwer, Alcides Lanza, Terry Riley, Tracy Silverman, Maureen Forrester, Eduardo Fernandez, the Cherubini Quartet and the Turtle Island String Quartet, and he has also worked with conductors such as Pinchas Steinberg, Charles Dutoit, Wojciech Rajski, Mario Bernardi and Yannick Nezet-Séguin.
Several of his CDs have been honoured with prices and nominations, he received already twice the coveted Canadian FELIX award for the best classical CD of the year.
Pierri gives master classes at major music festivals such as the New York Manhattan Masters, GFA Guitar Foundation of America, Québec FIG, the SIG Séminaire International de Guitare in Paris and Bordeaux, in Barcelona, at the Mozarteum Summer Academy in Salzburg, the Wiener Meisterkurse, the Villa Musica in Mainz, and in Tokyo, Osaka, Seoul, and Hong Kong.