This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
A musical note entry records a named tone of the diatonic scale that esoteric and astrological correspondence systems have long paired with a planet, a day, or another governing factor, an association drawn from the far older doctrine of musica universalis, the music of the spheres, the idea that the cosmos itself is structured by number and musical ratio and that a planet's own motion corresponds to a specific pitch.
An entry records a note's documented name and its position within the scale, and where a specific correspondence system assigns it to a planet or another governing factor, states which system makes that assignment, since different documented correspondence traditions do not always agree on exactly which note belongs to which planet.
An entry treats musica universalis honestly as a documented ancient and medieval idea about cosmic structure, not as an empirically settled fact about the physical universe, since it is the doctrine's own long, checkable intellectual history, not any claim of scientific proof, that makes it worth recording as the root of these correspondence systems. An entry also notes, where a specific correspondence system documents it, whether a note to planet pairing follows a documented ancient scheme such as the Pythagorean or Ptolemaic ordering of the planets, since later systems did not always inherit the same ordering unchanged.