Augmented and diminished chords are not as common as major or minor chords, but it is still important to learn them. They occur in many pieces of music as a way of creating tension before resolving to either a major or minor chord. Here are some examples demonstrating these chords. Listen to the CD to hear what they sound like.
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Here is an example which uses arpeggios of all four types of triads – major, minor, augmented and diminished. Pay careful attention to the fingering.