⚡ One glance 🖐️ Technique 🎼 Scales 🎵 Let It Be 💡 Note → chords 🌍 New keys 🔄 Circle 🧠 The insight ✅ Homework
Lesson 3 · July 17, 2026 · The Recording Club

One note, three chords: harmonizing what you hear.

The headline lesson: any note someone sings fits under three different chords — and you got to choose between them in real time. Then we carried the whole system into F, B♭ and D.

🎓 Poseidon Ho 🎯 Goal: hear a song & play it 📅 Jul 17 — a month after Lesson 2 ⏱️ ~70 min
⚡ The lesson, in one glance

Six things happened

🖐️

Technique reset

Relaxed, curved fingers. Play from the wrist. Thumb-under as a fluid "contrary motion" — never forced.

🎼

Scales rebuilt by formula

W·W·H·W·W·W·H got you F, B♭ and E♭ from scratch — no memorization needed.

🎵

"Let It Be" came back

1-5-6-4, then 1-5-4-1 — sung and played, voice-led, left hand on roots.

💡

One note → three chords

The headline. Every sung note is the root, 3rd or 5th of three diatonic chords. You pick the color.

🌍

New keys unlocked

Diatonic triads 1→6 in F and B♭, then 1-5-6-4 in D. Same numbers, new landscape.

🎹

You composed

You made up a melody, harmonized it yourself, and stumbled into a C/G — "a beautiful progression."

🖐️ Technique

Play from the wrist, not the finger

🌊Curved & relaxed. Keep a gentle curve in the finger — never let it flatten or go concave.
⬇️The wrist drops the note. Hold the finger still; let the wrist fall gently to press the key.
🔀Thumb-under = contrary motion. Fingers "wiggle against each other" — a fluid flop, not a harsh reach.
📏Wrist height low. When it creeps up, tension follows. Bring it down.
"It should be fluid and as relaxed as possible."Greg — on every crossunder
🎼 Scales

The formula builds any scale: W·W·H·W·W·W·H

You rebuilt F (1 flat), B♭ (2 flats) and E♭ (3 flats) live — from the whole/half-step formula, not from memory. Tap to hear each one.

F major — F·G·A·B♭·C·D·E·F
B♭ is the one flat. Start even, stay relaxed.
🎵 Song recall

"Let It Be" — back in the hands after a month

🔢Verse = 1-5-6-4, resolving 1-5-4-1 — you recalled the numbers yourself.
🔗Voice-led. For each change: which inversion is closest to where you are?
🤚Left hand joined on roots while the right hand stayed close.
🎤Sung + played together — the whole verse, start to finish.
⚡ The drill that followed
  • Greg called chord numbers at random — 1, 6, 3, 4, 5, 2 — and you landed all of them.
  • Some still take a beat. The fix: drill the hesitant one → leave it → come back. "Give yourself the chance to forget it a little, then return."
💡 The headline

Any note fits three chords — you choose the color

A melody note is the root of one chord, the 3rd of another, and the 5th of a third.

  • 🎤 Greg sang a note → you found it on the piano (sing it yourself first when it hides).
  • 🎹 Then you named every diatonic chord that holds it — and played each one under the note.
  • 🔁 Two-note melodies → two chords. Then the same notes again with different chords.
  • ✍️ Then your own melody, your own progression — including a C/G you found by ear. Slash chords come later; the ear got there first.
⚠️ Skip the 7 chord
  • The chord on the 7th degree (B° in C) is diminished — its fifth is flat, so it never feels grounded. Avoid it when harmonizing; pop music almost never touches it.
Try it: E under three chords
E is the 3rd of C, the root of Em, and the 5th of Am. Same note, three colors.
🔊 That choice — root, 3rd or 5th — is the art of accompaniment.
🎼 Bonus theory — the chord-quality ladder (you asked)
  • Take a 7th chord and flatten one note at a time: major 7 → dominant 7 (♭7) → minor 7 (♭3) → half-diminished (♭5) → diminished (𝄫7).
  • Pop songs live almost entirely in major, minor, and the occasional minor 7. Full ladder = a future lesson.
🌍 New keys

Same numbers, new landscape: F, B♭, then D

Every exercise moved out of C: triads 1→6 up and back down, melodies harmonized in F and B♭, then 1-5-6-4 in D. The key changes; the numbers never do.

The six chords of F
B♭ is permanent here — so the 2 chord (G·B♭·D) comes out minor. Tap a chip.
🔑Why qualities flip: the key's flats/sharps are permanent. In B♭, every E is E♭ — so a C triad is automatically C minor.
🎯In D, watch the sharps: F♯ and C♯ live in every chord that touches them.
🔄 The map

Around the circle: C → F → B♭ → E♭ → A♭ → D♭ → G♭

  • ➕ Each step around the flat side adds one flat: F has 1, B♭ has 2, E♭ has 3…
  • 🔁 G♭ = F♯. Six flats or six sharps — same keys, your pick. Past that point, sharps win (B major = 5 sharps beats 7 flats).
  • 👻 In G♭, the "4" is C♭ — the white key you know as B. No black key exists there.
  • 📹 Greg played triads 1→6→1 in all twelve keys on camera at the end of the lesson — the full run-through is on your lesson video.
🔍 Flagged for next time
  • The enharmonic switch (G♭/F♯, why the sharp side takes over) didn't fully click yet — we'll re-walk it in Lesson 4.
Tap any key to hear its home chord
Clockwise = up a fifth. Counter-clockwise from C = the flat keys we worked today.
🧠 The insight

It's not muscle memory — it's data chunking

🗺️

Layer 1 — the scale

When someone says "B♭," you should see the whole landscape — which keys are in, which are out.

🏗️

Layer 2 — the triads

Chords are 1-3-5 stacked on that scale. If layer 1 is fluid, layer 2 is free.

"I think now we're at the edge of your capability, and we're working on stretching it. It'll go pretty quickly for you."Greg — end of lesson. Realistic horizon for harmonizing songs unaided: a few months.
✅ Homework · fill the gap

Three assignments — every one in every key

Greg spotted exactly where the gap is: the chords in keys beyond C. These three close it. Check them off as they get solid.

✓

🎼 Major scale — all 12 keys

Goal: any key on demand, even and relaxed
  1. Build each one from the formula: W·W·H·W·W·W·H.
  2. Flat side first (F, B♭, E♭, A♭, D♭, G♭), then the sharp side (G, D, A, E, B) — twelve with C.
  3. Slow and even beats fast and lumpy.
✓

🎹 Triads 1→6→1 — all 12 keys

Goal: hear "F♯" and play 1-2-3-4-5-6-5-4-3-2-1 without pausing
  1. Play each triad in its correct quality (2, 3, 6 come out minor).
  2. Greg's 12-key run-through at the end of the lesson is your model — it's on your lesson video.
  3. When one hesitates: drill it, leave it, come back to it.
✓

🎵 "Let It Be" — all 12 keys

Goal: 1-5-6-4 is portable; prove it everywhere
  1. Left hand roots, right hand closest inversion.
  2. Sing while you play — that's the whole point.
  3. Started in D at the lesson: F♯ and C♯ are waiting for you.
🎯 Between lessons
  • The Ear Trainer runs the same note-→-chord game we played live — notes, melodies, and harmonize tracks, in every key.
  • Notes from the lesson live on the shared notes page — both of us can add to them anytime.