Let’s look at how to play an Adim (A diminished) chord on the piano. We’ll also learn the pattern for building any diminished chord.
What Are Diminished Chords?
So to build a diminished chord, we’ll start by building a minor chord. Minor chords are built using the first, third and fifth notes of the matching minor scale (learn how to build a minor scale here).
How to Play an Adim Chord
Then we’ll take the upper-note, E, and lower it 1/2 step to E♭.
So to play an Adim chord, we’ll play:
A – C – E♭
Diminished chords can be written as “dim” or “º”. So if you see a chord written as Aº, it also indicates an A diminished chord.
Other Chord Types
There are many other chord types you can learn. Here are some others:
Now you know how to build an Adim chord, and you can use that pattern to build any diminished chord on the piano.
Understanding how to build chords is so much better than memorizing the notes for each chord, because once you understand how to build different chords you can use the pattern again and again! The piano begins to come to life as you recognize patterns and start seeing the relationships between notes.