chord-quality-ear-trainer

🎧 Ear Trainer

Chord Quality Quiz

Listen to the chord, guess the quality, build a streak – with detailed stats and local save function.

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Click "Start Quiz". You will hear a random chord quality.
πŸ“Š Detailed Statistics
Tip: Practice triads (Maj/Min/Dim/Aug) first, then enable 7th chords.

How to use this Ear Trainer

This tool is an interactive quiz designed to sharpen your musical ear. You will hear random chords generated using the Web Audio API and must identify their quality.

  • Triads: Practice the basic four: Major (bright), Minor (dark), Diminished (tense), and Augmented (dreamy).
  • 7th Chords: Once you are comfortable, enable 7th chords to include Major 7th, Dominant 7th, and more.
  • Arpeggio Mode: If you find block chords difficult, enable Arpeggio mode to hear the individual notes played in sequence.

Your progress is saved locally in your browser, so you can track your best streaks and accuracy over time without needing an account.

Web Audio API Β· triads Β· 7ths Β· streaks

Chord Quality Ear Trainer: Identify Major, Minor, Diminished, Augmented & 7th Chords by Ear

The Chord Quality Ear Trainer plays a chord through your browser using the Web Audio API and challenges you to identify its quality β€” developing one of the most practical musician skills: recognising chords by sound rather than sight. It covers all four triads (major, minor, diminished, augmented) and all common seventh chord types (maj7, dom7, m7, m7b5, dim7), tracks your streak and accuracy per chord type, and adjusts difficulty as your ear improves.

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Web Audio API Playback

Chords are synthesised and played directly in the browser β€” no plugins, no downloads, no MIDI device needed. Works on desktop and mobile. Chord playback uses a piano-like tone with realistic decay. Play the chord again as many times as needed before guessing.

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Per-Quality Accuracy Stats

Tracks correct/incorrect answers separately for each chord quality. Instantly identifies your weak spots: if you confuse m7 with m7b5, you see it clearly. Session stats persist in localStorage between practice sessions.

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Streak & Difficulty Progression

Maintains a live answer streak counter. After 10 correct answers in a row, difficulty increases: additional chord qualities are added, root notes change more frequently, and inversions are introduced (optional). Gamified to keep practice engaging.

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Configurable Settings

Choose which chord qualities to include in the training set. Set root note range (fixed root, common piano range, full range). Toggle harmonic vs. melodic (arpeggiated) playback β€” arpeggiated is easier for beginners; harmonic (all notes at once) is the real challenge.

Chord quality reference

How to Recognise Each Chord Quality by Ear: Key Sonic Characteristics

Chord qualityIntervals (from root)Example (C)Sound characterMemory hook
Major triadR + M3 + P5C–E–GBright, happy, stable, completeFirst two notes of "Happy Birthday" (same interval as M3)
Minor triadR + m3 + P5C–Eb–GDark, sad, emotional β€” like major but "deflated"First two notes of "FΓΌr Elise" (m3 drop)
Diminished triadR + m3 + d5C–Eb–GbTense, unstable, sinister β€” both thirds are minorHorror movie chord; extremely tense, wants to resolve
Augmented triadR + M3 + A5C–E–G#Dreamy, ambiguous, unresolved β€” raises the 5thLike major but "stretched" β€” unsettled, floating quality
Major 7th (maj7)R + M3 + P5 + M7C–E–G–BWarm, sophisticated, jazzy, luminousLike major + one note that "shimmers" at the top
Dominant 7th (dom7)R + M3 + P5 + m7C–E–G–BbBluesy, tense, strong pull towards resolutionBlues/jazz 7th β€” the "wanting to go home" chord
Minor 7th (m7)R + m3 + P5 + m7C–Eb–G–BbMellow, smooth, cool, less tense than dom7Common in soul, R&B, jazz β€” relaxed minor colour
Half-dim (m7b5)R + m3 + d5 + m7C–Eb–Gb–BbDark, tense, unresolved β€” the ii chord of minor keysDiminished triad with a slightly softer top β€” "dark and anxious"
Diminished 7th (dim7)R + m3 + d5 + d7C–Eb–Gb–AMaximum tension, symmetrical, cinematic dreadThe "storm approaching" chord in horror films and Romantic era music
Ear training programme

Structured 8-Week Ear Training Plan for Chord Quality Recognition

  1. Weeks 1–2: Major vs. Minor (triads only, fixed C root)Start by training only the most fundamental distinction: major (bright) vs. minor (dark). Use only root position, always rooted on C. Do 20 repetitions per session, daily. Target: 95%+ accuracy before moving on. This binary distinction is the foundation β€” everything else builds on it.
  2. Weeks 3–4: Add diminished and augmented, still fixed rootIntroduce the other two triads. Diminished is easy to identify (maximum tension, "horror" quality); augmented is harder (sounds like major at first but has a floating instability). Work the four-way distinction until you reach 90%+ accuracy on all four types in isolation.
  3. Weeks 5–6: Introduce 7th chords in pairsAdd maj7 vs. dom7 first (both major-sounding, but maj7 is luminous/settled, dom7 is tense/pulling). Then add m7 (compare against minor triad β€” m7 is softer). Finally add m7b5 and dim7. Compare chord pairs in focused 15-minute daily sessions targeting the specific pairs you confuse most.
  4. Weeks 7–8: Random root notes + inversions (advanced)Enable random root notes in the trainer settings. The chord quality should now be identifiable regardless of pitch level. Then optionally add first and second inversions (the root is not on the bottom) β€” the hardest skill, but transformative for real-world chord recognition in music and transcription. Professional musicians can identify inversions reliably; intermediate musicians focus on root position first.
FAQ

Frequently Asked Questions

How long does it take to develop reliable chord quality recognition?

With consistent daily practice (15–20 minutes/day), most musicians reach reliable major/minor distinction within 1–2 weeks. Adding diminished and augmented triads to 90%+ accuracy typically takes another 2–3 weeks. Seventh chord quality recognition (distinguishing maj7, dom7, m7, m7b5) generally takes 6–10 weeks of consistent practice to reach reliable real-world recognition. These timelines assume the learner has basic instrumental experience. Absolute beginners (no instrument background) may take 2–3Γ— longer, while musicians with active listening experience (playing in bands, transcribing songs) often progress faster. The key variables are daily repetition volume (more repetitions per day = faster progress) and active musical engagement outside the trainer (listening to music and consciously identifying chords you hear).

What is the difference between harmonic and arpeggiated (melodic) playback for ear training?

Harmonic (block chord) playback sounds all notes of the chord simultaneously β€” as you would hear a pianist play a full chord. This is harder to identify because the individual intervals blend together into a composite sound. Arpeggiated (melodic) playback sounds notes one at a time in sequence β€” like strumming a guitar or playing a broken chord. This is easier because you can hear each interval sequentially, making it simpler to count half steps and identify the chord type analytically. For ear training purposes: start with arpeggiated playback to learn the interval content of each chord type, then switch to harmonic (block chord) playback as your primary training mode β€” since real-world recognition requires identifying block chords as they actually occur in music. Both modes are available in the trainer.

Why is the augmented chord harder to identify than diminished?

Diminished chords are easy to identify because their character is extreme and distinctive β€” maximum dissonance, strong "horror film" quality, the tritone (most dissonant interval) between the 3rd and 5th makes it immediately tense. The sound is hard to confuse with anything else. Augmented chords are harder because they sound deceptively similar to major chords at first β€” both have a major third from the root. The difference is the 5th: major = perfect 5th (stable, solid); augmented = raised 5th (slightly unstable, floating). The augmented chord has a dreamlike, unresolved quality that is subtle rather than dramatic. To train augmented recognition: focus on the "floating" instability of the 5th compared to the "solid landing" of a major chord's 5th. Playing major and augmented back-to-back on the same root (C major vs. C augmented) makes the difference immediately apparent.

Can ear training help with transcribing songs by ear?

Yes β€” chord quality ear training directly translates to transcription ability. When transcribing a song, the two key skills are: (1) identifying the root movement (interval recognition / relative pitch β€” a separate but complementary skill) and (2) identifying what quality the chord is at each root. Chord quality ear training specifically develops skill (2). After training, when you hear a chord in a song, you can quickly determine: "that's minor 7th" or "that's a dominant 7th" β€” which immediately narrows down the harmonic context and confirms or rules out key signatures. Combined with interval recognition for root movement, these two skills together enable full chord-by-ear transcription. Recommended supplementary practice: pick songs you know well, play along on your instrument, and pause at each chord change to identify the quality using the same listening approach practiced in the trainer.

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