Analyze & Understand
From key detection to chord reverse lookup, progression analysis, and transposition. Turn what you hear into practical theory you can apply.
Learning path
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Transpose Tool
Transpose the result into practical keys with Transpose Tool
Related tools in this topic
Diatonic Chord Reference
Choose a key and see its diatonic chords instantly. Compare triads and seventh chords by ear, then use them for songwriting or progression practice.
Circle of Fifths
Tap the circle of fifths to hear key relationships, accidentals, and V-I movement. A visual way to understand keys, modulation, and progressions.
Progression Generator
Pick a key and a mood, then generate a musically coherent chord progression and play it back instantly.
Related articles
Key Finder
Chord Finder
Chord Analysis
Transposition
Diatonic Chords
Study it systematically
Once you have tried the tools, move on to the main course, which builds up in the same order as a conservatory theory curriculum.
- 5 lessons Chord Structure Triads and seventh chords, inversions and figured bass, roman numerals — and how they map onto chord symbols. Open this unit →
- 5 lessons Chromatic Harmony Secondary dominants, mode mixture, the Neapolitan sixth, augmented sixth chords, and modulation. Open this unit →
- 4 lessons The Twentieth Century and Popular Music Tensions and altered chords, modal harmony, symmetric scales, tritone substitution and chord–scale thinking. Open this unit →