The philosopher René Descartes wrote the Compendium musicæ in 1618. Even though he was not known for his music production, he maintained a long correspondence around the subject in dialogue with Marin Mersenne, Constantjin Huygens, Isaac Beeckman and Joan-Albert Ban. However, his musical propositions appear as a marginal subject in his intellectual journey. To understand whether the musical theme relates to the development of his ideas, first, the organization of his correspondence about music and the citations to it in his (...) works was necessary, either in smaller texts or in the works published by the author. We analyzed the hypotheses about the forgetfulness of music in studies about the development of Descartes´ ideas. With these materials, we analyzed and historically contextualized the trajectory of the author's musical conceptions with the development of his main themes. Thus, it is possible to verify Descartes' musical dialogues with his own work and with his historical context. (shrink)