piano chord
Dmaj7
D1F♯3A5C♯7
Major triad with a major seventh: a half step below the root, an octave up.
What is true of it
Dmaj7 is D, F♯, A and C♯ — 1, 3, 5 and 7 counted from D.
On an instrument that cannot reach all 4, the 5 goes first, in that order.