A chord
A major
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The A chord has the intervals I, III, V. The major chord is one of the basic triads and can be found in every genre of music. It is characteristically happy and often serves as a basis for forming more complex chords.
Matching Scales: A Major A Major Pentatonic A Mixolydian C# Minor C# Harmonic Minor C# Phrygian E Major E Mixolydian E Dorian