Circle of Fifths Explorer

The circle of fifths you can touch, hear and play. Circle of Fifths Explorer turns the most useful diagram in music theory into an instrument. Turn the circle with a finger: the key you choose comes to the top, and the seven chords of that key light up around it. Tap to explore, double-tap to hear, and every chord, scale and cadence plays on a real sampled grand piano. THE CIRCLE • Three rings: major keys, relative minor keys and the diminished chord of each key. • All 15 major and 15 minor keys, with enharmonic spellings: F♯ / G♭, C♯ / D♭, B / C♭. • Turn it with a finger and it snaps to a key; tap a sector to select it, double-tap to hear its chord. • The diatonic window: the six chords of the key and the diminished chord, with roman numerals, turn with the selection. • Show secondary dominants or borrowed chords on the circle. KEY SIGNATURES AND SCALES • The key signature drawn on the staff, in treble and bass clef. • The scale with its degrees, spelled correctly in every key: E♯ in F♯ major, F♭ in C♭ major. • Play the scale up and down, or tap a degree to hear one note. • The seven modes on any tonic – Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian – with their parent key. CHORDS AND CADENCES • The seven diatonic chords as triads or seventh chords, with roman numerals and functions (tonic, subdominant, dominant). • Harmonic minor: the major dominant and the leading-tone chord in minor keys. • Hear the cadences of the key: authentic (I–IV–V–I), ii–V–I, plagal and deceptive. • Secondary dominants (V7/V, V7/vi…) and borrowed chords from the parallel key (iv, ♭VI, ♭VII…). RELATED KEYS AND MODULATION • Relative, dominant and subdominant keys and their relatives, parallel key, a whole step up. • How many accidentals change, a short explanation and the pivot chords the keys share. • Play a modulation from one key to the other, then move the circle there with a tap. BUILD A PROGRESSION • Tap chords to build a progression of up to 16 chords, with sevenths, secondary dominants and borrowed chords. • Listen to it with smooth voice leading on the piano. • Turn the circle and the progression follows the new key. • Share it as text with numerals and chord names. QUIZ IN THREE LEVELS • How many sharps or flats? Which key has this signature? Relative minor? Which chord is vi? A fifth above or below? • Level 1: major keys up to 3 accidentals. Level 2: major and minor up to 5. Level 3: all 30 keys and seventh chords. • Statistics for each kind of question and your best streak, saved on your phone. NOTE NAMES C D E, Do Re Mi or German H and B, following your language or your choice. PERFECT FOR • Songwriters looking for chords that fit together. • Guitarists, pianists and singers who improvise or transpose. • Music theory students preparing exams. • Teachers who want a circle of fifths that sounds. OFFLINE AND PRIVATE No ads, no in-app purchases, no account and no internet permission. Dark and light theme, 71 languages. By FELICE MARRA MUSIC STUDIOS.