Rampal had sensed that the time was right. In an interview with the New York Times, he offered one explanation for the appeal of Baroque music after the war: "With all this bad mess we had in Europe during the war, people were looking for something quieter, more structured, more well balanced than Romantic music." In the process of excavating forgotten works for performance, Rampal also had to discover new ways of playing that era's music. He applied his own bright tone and the liveliness and freedom of his style to the original texts, developing along the way a very individual approach to interpretation and, after the Baroque style, to improvised ornamentation. Throughout, Rampal was never tempted to perform on a period instrument; the movement that championed "authentic" instruments for "true" performance of Baroque music had not yet emerged. Instead, he drew on the full range of effects offered by the modern flute to reveal fresh elegance and nuance to Baroque compositions. It was this modernity–the richness and clarity of his sound and the freedom and personality in his expression–combined with a sense of hidden treasures being shared that caught the attention of a wider musical public. "Enchantment is the best possible word to describe this concert", said one Canadian reviewer for Le Devoir in 1956; "Rampal's playing struck me through its variety, its flexibility, its colour and above all its liveliness." This striking effect can be heard on his earliest recordings, between 1946 and 1950. During this period, Rampal quickly benefited from the birth of the long-playing gramophone record. Before 1950, all of his recordings were on 78 rpm discs. After 1950, the 33⅓ rpm long-playing era allowed much greater freedom to accommodate the rate at which he was committing performances to record. At the same time, the birth of the television age ensured Rampal a wider prominence in France than any previous flute-player, through his many concert and recital appearances in the late 1950s and beyond.
Through his recordings for labels including L'Oiseau-Lyre and, from the mid-1950s, Erato, Rampal continued to give new currency to many "lost" concertos by Italian composers such as Tartini, Cimarosa, Sammartini, and Pergolesi (often collaborating with Claudio Scimone and I Solisti Veneti), and French composers including Devienne, Leclair, and Loeillet, as well as other works from the Potsdam court of the flute-playing king Frederick the Great. His 1955 collaboration in Prague with Czech flautist, composer, and conductor Milan Munclinger resulted in an award-winning recording of flute concertos by Benda and Richter. In 1956, with Louis Froment, he recorded concertos in A minor and G major by C.P.E. Bach. Other composers of the era, such as Haydn, Handel, Stamitz, and Quantz, also figured significantly in his repertoire. He was open to experimentation; once, through laborious over-dubbing, he played all five parts in an early recording of a flute quintet by Boismortier. Rampal was the first flautist to record most, if not all, of the flute works by Bach, Handel, Telemann, Vivaldi, and other composers who now comprise the core repertoire for flute players.