piano chord
Amaj7
A1C♯3E5G♯7
Major triad with a major seventh: a half step below the root, an octave up.
What is true of it
Amaj7 is A, C♯, E and G♯ — 1, 3, 5 and 7 counted from A.
On an instrument that cannot reach all 4, the 5 goes first, in that order.