Music was a big part of the Frassati household and Pier Giorgio loved it. Pier Giorgio, however, was not very musically inclined. As a child, he took piano lessons for a brief period. On September 20, 1913, he wrote from Pollone to his mother: "Every day I do an assignment and practice the piano, I read and I also do a little gymnastics." The piano lessons did not continue for long.
Although he was not gifted musically, he had an appreciation of the arts, often attending the opera or symphony. The family's pets, Mime, Wotan and Parsifal, were named for characters in works by the composer Richard Wagner. In letters to his family and friends, Pier Giorgio made many references to concerts he attended.
He wrote to his mother from Germany on October 12, 1921:
"The other evening I went together with Prof. Rahner to a concert given by a Pole who played Beethoven and Chopin and I thought of you all who so love music. In the evenings here one could go to the theater but I prefer to study a bit and then go to bed early to be able to get up nice and early. I might go and see “Die Braut von Messina” but I would like first to read it so as to be able to understand it better."
On April 10, 1925, he wrote to his sister Luciana:
"The other evening I was with Severi at Luotto’s house where we spent 2 delightful hours listening to concerts from London, Paris through the wireless telephone and then all the news of the last hour."
To a young German friend, Maria Fischer, he wrote on August 29, 1922 and described for her a booklet of songs his university group had put together and Pier Giorgio had published:
"This year the students of Turin, both the guys and the girls, have collected our songs in a little booklet; I believe that you’ll like them because they’ll remind you of the FUCI Conventions, and therefore I have sent you a copy."
He enjoyed singing on his trips to the mountains and ski slopes. He mentions it to a friend Nora Figna on a postcard he sent on February 10, 1924:
"Skiing and singing in these happy hours..."
Of all the stories that have been told about Blessed Pier Giorgio and his love for singing, the one most often repeated is that he sang often and loud and very noticeably out of tune!