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🧰 Required Tools & Equipment

✓ Piano keyboard or 61-key MIDI controller
✓ Smartphone with overhead tripod or high-angle mount
✓ Metronome app

📦 Materials & Supplies

✓ Removable keyboard note labels or color dot stickers
✓ Blank staff or keyboard diagram sheet
✓ Pencil

⚠️ Safety Checkpoints & Warnings

• Maintain a neutral, level wrist aligned with your forearm to avoid carpal tunnel strain.
• Keep knuckles rounded and relaxed, pressing keys with natural arm weight rather than pushing hard.
• Keep keyboard speaker or headphone audio below 70 dB to avoid acoustic fatigue.

📋 Step-by-Step Guide (6 Steps)

Frame the Camera and Find Middle C

Mount your phone camera at a 45-degree angle pointing down so the camera clearly sees your wrists, fingers, and two octaves. Locate Middle C, which is the white key sitting directly to the left of the group of two black keys near the center of the keyboard. Rest your right thumb lightly on Middle C without pressing down.

👁️ Camera AI Checkpoint

• Camera shows both wrists elevated level with the keybed
• Right thumb rests directly on Middle C

🛑 Watch Out For

• Positioning camera too low so finger numbers and black keys are obscured
• Collapsing wrists below the edge of the keybed

⚠️ Safety Note: Adjust your chair or bench height so your elbows sit at roughly a 90-degree angle to the keys.

Map Half-Steps and Semitones

A half-step is the distance from any key to the very next immediate key, black or white. Start on C and count upward half-step by half-step: C to C-sharp (1), C-sharp to D (2), D to D-sharp (3), D-sharp to E (4). Place a temporary dot sticker on C, E, and G to visually mark your target intervals.

👁️ Camera AI Checkpoint

• Three stickers visibly placed on keys C, E, and G
• Finger correctly touches consecutive black and white keys during counting

🛑 Watch Out For

• Skipping black keys when counting half-steps
• Counting the starting note as step 1 instead of step 0

⚠️ Safety Note: Keep finger movements light while touching keys during the counting phase.

Assemble the C Major Triad (Formula: 4 + 3)

Construct the Major triad formula: Root + 4 half-steps + 3 half-steps. Place finger 1 (thumb) on C, count up 4 half-steps to place finger 3 (middle) on E, then count up 3 more half-steps to place finger 5 (pinky) on G. Depress all three keys simultaneously with a gentle, unified drop of your hand.

👁️ Camera AI Checkpoint

• Fingers 1, 3, and 5 cleanly depress C, E, and G together
• Fingers 2 and 4 hover naturally without curling stiffly inward

🛑 Watch Out For

• Playing with flat, locked fingers instead of a curved arch
• Accidentally sounding the adjacent F key with finger 4

⚠️ Safety Note: Drop the hand into the keys using arm weight; do not punch or jam fingers downward.

Convert to C Minor via the Flat Third (Formula: 3 + 4)

To turn any major chord into a minor chord, lower the middle note (the 3rd) down by exactly one half-step while keeping the Root and 5th unchanged. Lift finger 3 from E and move it left to the black key, E-flat. Press C, E-flat, and G together with fingers 1, 3, and 5 to hear the darker, somber minor tonality.

👁️ Camera AI Checkpoint

• Finger 3 positioned securely on the black E-flat key
• Fingers 1 and 5 remain anchored on C and G

🛑 Watch Out For

• Moving the thumb or pinky instead of solely shifting the third
• Resting finger 3 too far back on the thin tip of the black key causing it to slip

⚠️ Safety Note: Slide your entire hand slightly forward into the keybed so finger 3 reaches the black key comfortably.

Apply the Formula to a New Root (D Major & D Minor)

Move your thumb to D as the root note. Calculate D Major by counting up 4 half-steps to F-sharp, then 3 half-steps to A (D-F#-A). Next, lower the 3rd by one half-step to natural F to play D Minor (D-F-A), using fingers 1-3-5 for both chords.

👁️ Camera AI Checkpoint

• D Major played with finger 3 on the black F-sharp key
• D Minor played with all three fingers on all-white keys (D-F-A)

🛑 Watch Out For

• Assuming all major chords use only white keys
• Forgetting to reset half-step counts from the new root

⚠️ Safety Note: Release tension in your shoulders between chord changes.

Practice Broken and Blocked Chord Drills

Set your metronome to 60 BPM. Play C Major as an arpeggio (C, then E, then G individually), then play all three as a blocked chord on beat four. Switch to C Minor on the next measure, alternating back and forth for 2 minutes while maintaining a relaxed hand posture.

👁️ Camera AI Checkpoint