Unlike many National Symphony musicians, who were not retained, Guidi was named the first violin of the New York Philharmonic.

[3] As a member of the Longo Trio in 1920, he collaborated with Nicholas Laucella in a recording of several popular songs including: The Meeting of the Waters and Believe Me if All Those Endearing Young Charms by Thomas Moore (Pathe, 22353).

[4] He remained in the first violin of the New York Philharmonic for a decade, from 1921 to 1931, under the direction, among others, of Willem Mengelberg and Arturo Toscanini.

[7] As a member of the Philharmonic String Quartet, Scipione also collaborated with Arthur Lichstein, Louis Barzin and Osvaldo Mazzuchi in recordings of Robert Schumann's Quintette in E Flat Major and Antonin Dvorak's Quartet in F Major (American) on the Edison label in 1927 and 1928.

[10] Guidi later moved to Los Angeles, where he became a successful musician in the orchestras of Hollywood studios.