D#

D sharp falls outside the modern chakra-tone correspondence system for the same structural reason as every other chromatic note in this atlas: the system pairs seven chakras against the seven natural notes of the diatonic scale and was never extended by its original authors to the five notes that fall between them. No classical or widely accepted modern source assigns D sharp a chakra of its own, and the honest description is an absence rather than a disputed or hidden assignment.

Individual popular writers have occasionally proposed chromatic-note chakra pairings of their own invention, sometimes reasoning that a chromatic note represents a transitional state between its two neighbouring natural-note chakras, but no such proposal has achieved anything like the general acceptance the seven natural-note pairings enjoy within the wider chakra-tone literature, and different authors' proposals do not agree with each other.

D sharp and E flat name the same key on a modern equal-tempered instrument, another instance of the enharmonic equivalence that runs through all five chromatic notes in this atlas. Written music chooses between the two names according to the surrounding key signature and harmonic function rather than any difference in the sound produced, since equal temperament by design divides the octave into twelve exactly equal semitones with no acoustic distinction between a pitch's two possible spellings.

D sharp minor and E flat major are, despite naming what modern tuning treats as the identical set of pitches, conventionally written using different key signatures and are associated with different repertoire in practice, since composers and performers generally choose the spelling that produces the simpler, more legible notation for a given passage rather than switching between equivalent spellings freely.