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Music, art & photography · course 89 of 105

Piano Chords in Every Key

Spell any major scale, triad or common seventh chord on any key, name inversions, and know the chords of each major key, so a chart that says E♭ or Bm7 no longer stops you.

4 modules

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What it teaches

Counting keys in semitones, building any major scale, spelling major, minor, diminished and augmented triads on any key, naming inversions, the three common seventh chords, and the chords that belong to a major key (I, IV, V and the rest). The AI asks one question at a time, makes you show how you counted every third round, and brings each missed item back a few rounds later.

It can’t hear you play or see your hands. It drills knowing the notes, not technique.

How long

40 items. About 35-50 rounds plus a 12-item final: 2-3 sessions (estimate, not timed with a real student). The tutor gives a one-line save code at the end of each session.

The modules

4 modules, drilled one item at a time.

  1. M0

    The words

    The words: semitones, triads, inversions

  2. M1

    Keys, steps and major scales

    Count steps and build major scales

  3. M2

    Spelling triads

    Spell or name a triad

  4. M3

    Inversions, seventh chords and the chords of a key

    Inversions, seventh chords and the chords of a key

Before it teaches, it asks

  1. 1
    How long have you played, and what do you play now: nothing yet, melodies, chords from chord symbols, pieces from sheet music?
  2. 2
    Which note is 4 semitones above C?
  3. 3
    Spell the D major chord.

What’s exact, and what isn’t

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Straight from the course’s own notes.

Computed by script
Every note and chord answer, spelled one letter per step or chord tone and checked again on absolute key numbers; every chord name is the only reading whose letters stack in thirds; whole-range checks on all 12 roots (chords, scales, the chords of each key). All 32 hand answers matched.
Sourced
The definitions (semitone, the triad formulas, the major-scale pattern, inversions, seventh chords) quote Wikipedia, read 2026-10-10.