Practice Levels Guide

The most common chords in pop & folk

The starting point: the chords you hear in every folk song, every campfire singalong, every beginner tutorial on YouTube. This level includes the seven white-key major triads (C, D, E, F, G, A, B) plus the three most essential minor chords — Am, Em, and Dm. These are the chords of real music, not a theory exercise.

Minor chords appear from day one because Am, Em, and Dm are as common in real songs as C and G. Nearly every pop and folk song in a major key uses at least one of them. Starting here means your ear is trained on music as it actually sounds — not on a sanitised major-only subset that you'd never hear in the wild.

Move up when: you can identify any chord in this set without hesitation — both major and minor. If you're scoring 90% or better in Lily Pad Drill or Leap Quiz, you're ready.

Tip: Sing the root note after you hear the chord. This connects the sound to the note name and builds the habit of listening for the bass rather than the whole chord shape.

24 chords — All major and minor chords

Now you're working with every major and minor triad across all 12 root notes. The five black-key major chords (Db, Eb, F#, Ab, Bb) enter the mix, along with the remaining minor chords that weren't in The Campfire. That's all 24 major and minor triads — the full harmonic vocabulary of most popular music.

This is where many learners have their first real breakthrough. You stop hearing chords as specific shapes and start hearing chord quality as an abstract property: bright vs dark, resolved vs weighted. An Ab minor chord rooted far from the keys you learned first still sounds unmistakably minor. When your ear grasps quality independently of pitch, you've understood something important about harmony.

Move up when: you can identify any major or minor chord's root and quality without deliberate thought — the quality should register instantly, not after a moment of analysis.

Tip: The black-key root notes are the main challenge at this level. Db and D are only a semitone apart. Learn to hear the subtle shift in bass colour — it becomes easier once you stop comparing to a reference pitch and start hearing each root as distinct.

New at this level:

Add dominant 7th and major 7th chords

Seventh chords enter the picture. Dominant 7th chords are the engine of blues, funk, and jazz — that slightly tense, forward-pushing sound you hear in every 12-bar blues progression. Major 7th chords are the smooth, sophisticated sound of jazz ballads and bossa nova. Both appear constantly in real music, and both are immediately recognisable once you know what to listen for.

The challenge at this level is distinguishing 7th chords from their triad counterparts. A dominant 7th built on G sounds like a G major chord with something extra — a slightly unresolved edge that wants to move to C. A major 7th built on C sounds like a C major chord with an added warmth and colour. Your ear now needs to detect that fourth note and identify whether it adds tension (dominant) or smoothness (major 7th).

Move up when: you can reliably tell dominant 7th and major 7th apart from each other and from plain major and minor triads. The 7th should register as a distinct character, not just as "a major chord that sounds slightly different."

Tip: Listen for the top note. In a dominant 7th, the seventh is a semitone below the octave — close and tense. In a major 7th, the seventh is right next to the root above — smooth and close. That single semitone difference creates two completely different emotional characters.

48 chords — Add minor 7th, sus2, and sus4

Minor 7th chords and suspended chords round out the studio musician's toolkit. Minor 7th is the jazz and soul chord — Am7, Dm7, and Em7 underpin countless R&B progressions and bossa nova lines. Sus2 and sus4 chords replace the third with a second or fourth, creating open, ambiguous textures heard everywhere in rock, pop, and ambient music — Pete Townshend's guitar work, Coldplay's piano parts, Taylor Swift's acoustic moments.

The key to identifying suspended chords is learning to hear the absence of the third. Major and minor chords have a clear identity because the third defines their quality. Suspended chords lack that definition — they hover. Sus4 creates noticeable tension that wants to resolve downward. Sus2 is more relaxed and open. Minor 7th is the counterpart to dominant 7th: both have that "extra note" quality, but minor 7th is darker and smoother.

Move up when: you can reliably distinguish all chord qualities at this level across all roots. Suspended chords should feel like distinct categories, not just "neither major nor minor."

Tip: Minor 7th versus dominant 7th is a subtle distinction — both have an added seventh, but one is built on a minor triad and the other on a major triad. If the base quality sounds dark (minor 7th) vs bright-tense (dominant 7th), you'll find the distinction.

New at this level:

Everything — dim, aug, 7ths, 6ths, and more

The final level adds diminished and augmented triads alongside every remaining chord type in the app — 6th chords, add9, diminished 7th, half-diminished, and more. These are rarer in everyday pop but unmistakable once you learn to hear them. Diminished sounds tense, compressed, and unstable — the sound of suspense and unresolved drama. Augmented sounds dreamlike, floating, and symmetrical — a quality that's hard to describe but impossible to mistake once you know it.

Diminished chords are built from two stacked minor thirds, creating a tight, claustrophobic interval structure. Augmented chords are built from two stacked major thirds, creating a wide, evenly-spaced sound. Both want to resolve somewhere — neither sounds like a resting place. The 6th and add9 chords add colour and sophistication that composers reach for when a plain triad feels too bare.

When you've mastered this level: you can hear any chord ChordFrog throws at you and identify it. That's a significant skill — one that most musicians develop only after years of playing, if ever. You've built it systematically.

Tip: Diminished and augmented benefit most from repetition because you hear them less often in everyday listening. Seek them out in music you already know — they're there, once you know what to listen for.

New at this level: