Jazz Chord Construction Explained: Intervals to 7th Chords | Jazz Piano Theory #1

Learn how every jazz chord is built — from the smallest interval on the keyboard to full seventh chords — using one simple counting method that works from any of the 12 keys. In this lesson, you'll learn: ✓ How to measure any distance on the keyboard (semitones & tones) ✓ How to build your first Major and minor chord from scratch ✓ The role of the Root, 3rd, and 5th in every chord ✓ Chord inversions — and why jazz pianists use them constantly ✓ All 4 basic triads: Major, minor, Diminished, Augmented ✓ How adding one note (the 7th) unlocks the 5 chord families behind almost every jazz standard No music theory background required — just a piano and some curiosity. TIMESTAMPS 00:00 Introduction 00:21 What is a Semitone? 00:43 What is a Tone? 01:00 Counting Intervals on the Keyboard 01:10 Building Your First Major Chord 01:31 Root, 3rd, and 5th: Who Does What 01:47 Chord Inversions Explained 02:10 Building a Minor Chord 02:31 Major vs Minor: What Actually Changes 02:55 The 4 Basic Triads 03:39 Why Diminished & Augmented Sound Different 04:02 Adding the 7th (Seventh Chords) 04:45 The 5 Chord Families, Connected 05:12 What's Next Want to go further? Inside my complete courses at thejazzpianomethod.com, you'll learn how to voice these chords on the piano and apply them to real jazz standards like Autumn Leaves and Fly Me to the Moon. 👉 https://www.thejazzpianomethod.com #JazzPiano #PianoLessons #MusicTheory #JazzChords #learnpiano