[5] Encouraged by tenor Jan Peerce, she started her music studies at age 13 with William Herman, a voice teacher known for his exacting and thorough teaching method.
Under Herman's training, Peters studied the French, German and Italian languages and practiced singing scales from a clarinet method.
After six years of training, Herman introduced her to impresario Sol Hurok, who arranged for an audition with Rudolf Bing, general manager of the Metropolitan Opera.
Combining an attractive voice with sparkling coloratura agility and good looks, Peters became a favorite of American audiences and a great proponent of opera for the masses.
Her roles at the Met included Susanna in The Marriage of Figaro; Despina in Così fan tutte; the Queen of the Night in The Magic Flute; Amore in Gluck's Orfeo ed Euridice; Marzeline in Beethoven's Fidelio; Rosina in The Barber of Seville; Adina in L'elisir d'amore; Norina in Don Pasquale; Oscar in Un ballo in maschera; Nanetta in Falstaff; Olympia in The Tales of Hoffmann; Sophie in Der Rosenkavalier; Zerbinetta in Ariadne auf Naxos; and Adele in Die Fledermaus.
Peters also appeared abroad as early as 1951, when she sang at the Royal Opera House in London, in Balfe's The Bohemian Girl, conducted by Sir Thomas Beecham.
On the Sunday night CBS variety program The Ed Sullivan Show, Peters was its most frequent guest, appearing a record 65 times.
Early in her career in 1962, she performed before an audience of over 13,000 at the popular outdoor "Italian Night" concert series at Lewisohn Stadium in New York under the direction of conductor Alfredo Antonini.