Fiedler was born in Boston, Massachusetts, the son of Johanna (Bernfeld) and Emanuel Fiedler.
His parents were Austrian Jewish immigrants.
His father was a violinist who played in the Boston Symphony Orchestra, and his mother was a pianist.
He grew up in Boston, and attended Boston Latin School until his father retired in the early 1900s, and they moved to Vienna, Austria, in 1910.
 The family soon moved again, to Berlin, where from 1911 to 1915 young Fiedler studied violin at the Royal Academy of Music (Hochschule für Musik Berlin) under Willy Hess.
 Fiedler returned to Boston at the beginning of World War I. In 1915 he joined the Boston Symphony Orchestra under Karl Muck as a violinist.
He also worked as a pianist, organist, and percussionist.

In 1924, Fiedler formed the Boston Sinfonietta, a chamber music orchestra composed of Boston Symphony members, and started a series of free outdoor concerts.

Fiedler was appointed the eighteenth conductor of the Boston Pops Orchestra in 1930.
While the position of conductor of the Boston Pops both prior to and after Fiedler tended to be a phase of a conductor's career, Fiedler made it his life's work, having the position for a half-century.

With Fiedler's direction, the Boston Pops reportedly made more recordings than any other orchestra in the world, most of them for RCA Victor, with total sales exceeding $50 million.
His recordings began in July 1935 at Boston's Symphony Hall with RCA Victor, including a world premiere recording of Jacob Gade's "Jalousie", which eventually sold more than a million copies, and the first complete recording of Rhapsody in Blue by George Gershwin (with Jesús María Sanromá as soloist; around that time they also made the first recording of Edward MacDowell's Second Concerto).
 In 1946, he conducted the Boston Pops in one of the first American recordings devoted to excerpts from a film score, Dmitri Tiomkin's music for the David O. Selznick Technicolor epic Duel in the Sun.
RCA Victor released an album of ten-inch 78-rpm discs complete with photographs from the film.

Fiedler's June 20, 1947, recording of Gaîté Parisienne by Jacques Offenbach was eventually released by RCA as their first long-playing classical album (RCA Victor LM-1001), in 1950.
 He recorded the same music in 1954 in stereo and began making regular stereo recordings in 1956.
 A number of Fiedler's recordings were released as 45-rpm "extended play" discs, beginning in 1949, such as Tchaikovsky's Marche Slave and Ketèlbey's In a Persian Market (RCA Victor ERA-2).
 Besides recording light classics, Fiedler also recorded music from Broadway shows and Hollywood film scores, as well as arrangements of popular music, especially the Beatles.
 He and the Boston Pops occasionally recorded classical works that were favorites, but not considered as "light" as most of the pieces that he conducted.
 He made but a single recording with the Boston Symphony Orchestra: Dvorak's New World Symphony.
There were also recordings of chamber music by his Sinfonietta.
 Fiedler and the Boston Pops recorded exclusively for RCA Victor until 1970 (though the label has continued to issue many new Fiedler/Boston Pops compilations and unreleased recordings), when they switched to Deutsche Grammophon for classical releases with co-owned Polydor Records for his arrangements of pop music compositions and then London Records.
 His last album, devoted to disco, was titled Saturday Night Fiedler.

Fiedler was also associated with the San Francisco Pops Orchestra for 26 summers (beginning during 1949), and conducted many other orchestras throughout the world.
 He was a featured conductor on several of NBC's The Standard Hour programs in 1950 and 1951, conducting the San Francisco Symphony in the War Memorial Opera House; the performances were preserved on transcription discs and later released on audio cassette.

In very rare visiting performances, Fiedler accepted the invitation to conduct Don Caneva's John Hersey High School Bands after reviewing their latest recordings.
Caneva said, “I was tremendously pleased and delighte
Fiedler was born in Boston, Massachusetts, the son of Johanna (Bernfeld) and Emanuel Fiedler. His parents were Austrian Jewish immigrants. His father was a violinist who played in the Boston Symphony Orchestra, and his mother was a pianist. He grew up in Boston, and attended Boston Latin School until his father retired in the early 1900s, and they moved to Vienna, Austria, in 1910.  The family soon moved again, to Berlin, where from 1911 to 1915 young Fiedler studied violin at the Royal Academy of Music (Hochschule für Musik Berlin) under Willy Hess.  Fiedler returned to Boston at the beginning of World War I. In 1915 he joined the Boston Symphony Orchestra under Karl Muck as a violinist. He also worked as a pianist, organist, and percussionist.
In 1924, Fiedler formed the Boston Sinfonietta, a chamber music orchestra composed of Boston Symphony members, and started a series of free outdoor concerts.
Fiedler was appointed the eighteenth conductor of the Boston Pops Orchestra in 1930. While the position of conductor of the Boston Pops both prior to and after Fiedler tended to be a phase of a conductor's career, Fiedler made it his life's work, having the position for a half-century.
With Fiedler's direction, the Boston Pops reportedly made more recordings than any other orchestra in the world, most of them for RCA Victor, with total sales exceeding $50 million. His recordings began in July 1935 at Boston's Symphony Hall with RCA Victor, including a world premiere recording of Jacob Gade's "Jalousie", which eventually sold more than a million copies, and the first complete recording of Rhapsody in Blue by George Gershwin (with Jesús María Sanromá as soloist; around that time they also made the first recording of Edward MacDowell's Second Concerto).  In 1946, he conducted the Boston Pops in one of the first American recordings devoted to excerpts from a film score, Dmitri Tiomkin's music for the David O. Selznick Technicolor epic Duel in the Sun. RCA Victor released an album of ten-inch 78-rpm discs complete with photographs from the film.
Fiedler's June 20, 1947, recording of Gaîté Parisienne by Jacques Offenbach was eventually released by RCA as their first long-playing classical album (RCA Victor LM-1001), in 1950.  He recorded the same music in 1954 in stereo and began making regular stereo recordings in 1956.  A number of Fiedler's recordings were released as 45-rpm "extended play" discs, beginning in 1949, such as Tchaikovsky's Marche Slave and Ketèlbey's In a Persian Market (RCA Victor ERA-2).  Besides recording light classics, Fiedler also recorded music from Broadway shows and Hollywood film scores, as well as arrangements of popular music, especially the Beatles.  He and the Boston Pops occasionally recorded classical works that were favorites, but not considered as "light" as most of the pieces that he conducted.  He made but a single recording with the Boston Symphony Orchestra: Dvorak's New World Symphony. There were also recordings of chamber music by his Sinfonietta.  Fiedler and the Boston Pops recorded exclusively for RCA Victor until 1970 (though the label has continued to issue many new Fiedler/Boston Pops compilations and unreleased recordings), when they switched to Deutsche Grammophon for classical releases with co-owned Polydor Records for his arrangements of pop music compositions and then London Records.  His last album, devoted to disco, was titled Saturday Night Fiedler.
Fiedler was also associated with the San Francisco Pops Orchestra for 26 summers (beginning during 1949), and conducted many other orchestras throughout the world.  He was a featured conductor on several of NBC's The Standard Hour programs in 1950 and 1951, conducting the San Francisco Symphony in the War Memorial Opera House; the performances were preserved on transcription discs and later released on audio cassette.
In very rare visiting performances, Fiedler accepted the invitation to conduct Don Caneva's John Hersey High School Bands after reviewing their latest recordings. Caneva said, “I was tremendously pleased and delighte
Arthur Fiedler