Dorian
An organizing of notes in a scale used in the middle ages oriented around the notes D,E,F, or G.
In the context of music, "180 ms in d" likely refers to a duration of 180 milliseconds (ms) in the key of D. This could pertain to a specific note or sound duration within a piece of music that is centered around the D major or D minor scale. The timing indicates a very short note or sound, often used in rhythmic or percussive contexts.
a d note is right under the e note
D.
The dominant note for D major and D minor is A.
A Dorain mode D to D consists of no sharps or flats.
mode d emploi a la fasad
d
Yes composers can go from any key to any other. Through complicated kinds of modulations or simple mode mixtures. Mode mixture would be the easiest form of "key change" in terms of writing sharps and flats, however, your ears don't perceive it as a key change because the tonic note hasn't changed. For example, the key of D major has 2 sharps F# and C#. If you use mode mixture and change to D minor then there is on flat, Bb. These keys are written differently but the tonic note in each key is the note D.
The leading note of Db major is C.
O o o<--- d note o
exactly how a d note should sound on a flute