Ganz returned to New York City and taught at the Institute of Musical Art (later The Juilliard School). In 1920 in Carnegie Hall, he conducted the New York Philharmonic in his own performance of Franz Liszt's E-flat Major Piano Concerto, using the Aeolian Company's Duo-Art reproducing Weber grand piano and becoming the first pianist to conduct an orchestra for the concerto in which he played by piano roll. Later career as conductor and music educator From 1921 to 1927 he was the conductor of the St. Louis Symphony Orchestra and did much to raise it to the top rank of orchestras] As the fourth conductor of this orchestra Ganz was responsible for building and educating a new symphonic audience. The orchestra's first recordings, innovative children's and young people's concerts, as well as extensive spring tours to the Midwest, South, and Southwest were the sources for this new audience. During his six seasons twenty-one percent of the music presented comprised first St. Louis performances. They included Maurice Ravel's Rapsodie espagnole, Gustav Mahler's Symphony No. 4, Ottorino Respighi's Fountains of Rome, Ralph Vaughan Williams's London Symphony, Richard Strauss's A Hero's Life, Igor Stravinsky's Firebird Suite, Leo Sowerby's Suite From Northland, and Arthur Honegger's Pastorale d'été (American premiere). While in St. Louis, he was initiated as an honorary member of Phi Mu Alpha Sinfonia music fraternity in 1924 at the University of Missouri. In 1928 he returned to teach at the Chicago Musical College, serving as its president from 1934 to 1954, but he continued to maintain a national presence. From 1930 to 1933 Ganz founded and conducted the National Little Symphony (renamed the National Chamber Symphony) sponsored by NBC to promote contemporary music. He led the Omaha Symphony Orchestra from 1936 to 1941. From 1939 to 1948 he was permanent conductor of the Young People's Concerts with the New York Philharmonic and San Francisco Symphony orchestras, and from 1944 to 1946, with the Chicago Symphony Orchestra. From 1946 to 1948, he was music director of the Grand Rapids Symphony in Grand Rapids, Michigan, which was a community orchestra at the time. On 20 February 1941, Ganz performed his own Piano Concerto in E-flat major, Op. 32, with the Chicago Symphony Orchestra under Frederick Stock, its world premiere. The work was commissioned by Frederick Stock for the fiftieth anniversary of the Chicago Symphony Orchestra. Most of Ganz's musical compositions are held at The