He also appeared at summer festivals in the US and Canada (Ambler Temple University Festival, Hollywood Bowl, Ojai, Ravinia, Robin Hood Dell, Saratoga, Tanglewood, and Vancouver) as well as in Europe (Salzburg, Lucerne, Montreux). Steinberg conducted at the Metropolitan Opera in several productions including Barber's "Vanessa," Verdi's "Aida," and Wagner's "Die Walküre", during his sabbatical in 1964-65. Steinberg died in New York City on May 16, 1978, having entered the hospital after conducting a New York Philharmonic concert on May 1 that featured violinist Isaac Stern. Steinberg recorded "Don Juan" and his own suite from "Der Rosenkavalier" (works by Richard Strauss) with Walter Legge's Philharmonia Orchestra in the summer of 1957. The following year he conducted them in concerts at Lucerne before assuming the conductorship of the London Philharmonic. Steinberg's first recording was however made in 1928, when he accompanied Bronisław Huberman in Tchaikovsky's Violin Concerto with the Staatskapelle Berlin. In 1940 Steinberg recorded excerpts from Wagner's "Lohengrin," "Tristan und Isolde," and "Tannhäuser", as well as Mozart's "The Marriage of Figaro," with Metropolitan Opera members, issued anonymously on "World's Greatest Opera" records. After the war Steinberg made a single album for the Musicraft label with the Buffalo Philharmonic - the first studio recording of Shostakovich's Symphony No. 7 in 1946. He led several accompaniments for concerto recordings on RCA Victor by Alexander Brailowsky, Jascha Heifetz, William Kapell, and Arthur Rubinstein. Steinberg made numerous recordings for Capitol Records, all but two of them with the Pittsburgh Symphony. The exceptions included a recording with the Los Angeles Woodwinds of Mozart's "Gran Partita", K.361, taped in Hollywood in August 1952, and the aforementioned Strauss disc with the Philharmonia Orchestra. His Pittsburgh recordings for Capitol, all made in the Syria Mosque, included concertos with Nathan Milstein and Rudolf Firkušný, as well as a cross-section of the symphonic repertoire from Beethoven to Wagner. Nearly all of Steinberg's Capitol recordings were reissued in a 20-CD box set by EMI in September 2011.