17+ D Natural Minor Ascending US. Toccata and fugue in d minor, bwv 565. In a natural minor it's a g natural but in the harmonic minor it's a g#.
Although the natural minor scale is the original and purest form of the scale, composers using notes of the minor scale as the basis for compositions often typically, composers would raise both the 6th and 7th scale degrees only in ascending melodic passages.
Pentatonic scale fluency available from amazon. This ascending/descending distinction is respected in classical music. D e f g a b c d (conjugate with mixolydian). In descending passages, they would.