Piano Lessons For Beginners Lesson 9 - Triads. Minor Scales & Keys. Primary Chords. More here: http://www.piano-keyboard-guide.com/k... In this piano and keyboard lesson we will learn about triads, the relative minor, the keys of A minor and D minor, and natural minor, harmonic minor and melodic minor scales. Also, we will learn about accidentals and primary chords in A minor and D minor. How to play piano.

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