This is what the sound of D looks like.
Specifically, the sound of the D string on an acoustic guitar. It vibrates at a frequency of 146.83 Hz.
It’s also the key to Pachelbel’s Canon, one of my all-time favorites.
Of course, for key designations, the major is implied. Therefore, the minor must be explicit when denoting the key of D minor …
— Nigel Tufnel of Spinal Tap