Interactive explorers
Five interactive tools built on one idea: show the structure of music theory — the patterns, distances and groupings — and let the names follow. Each explorer isolates one structural insight and makes it visible and audible at the same moment.
Playable keyboard
Three octaves you can play with every key labelled — tap notes, hear them, and see where the white and black keys sit. The reference for everything else in the course.
Tool · Play & explore
Chord-progression looper NEW
Drop diatonic chords (I, IV, V, vi) into an eight-bar loop in C major, hear the progression cycle, and watch each chord light up on a mini-keyboard. Pop, doo-wop and ii–V–I presets included.
Pairs with: Chords & harmony
Bassline builder NEW
Step-sequence a one-octave bass line under a chord progression. The notes of each beat's chord are shaded, so you see and hear how a bassline outlines the harmony.
Pairs with: Chords & harmony
Bass line generator NEW
Generate funk, walking-jazz or rock bass lines from rules rather than stored licks — weighted chord-tone choices, chromatic approach notes and next-chord targeting, transposed over any progression you set.
Pairs with: Chords & harmony
Interval ear-trainer NEW
Hear two notes and name the interval, scored with a running streak. Each one comes with a famous-song hook — the Jaws minor 2nd, the Twinkle Twinkle perfect 5th — to lock it into your ear.
Pairs with: Intervals
Chord-quality ear-trainer NEW
Hear a chord and name its quality — major, minor, diminished, augmented and the four common sevenths. It tracks which qualities you confuse and drills those, and feeds your practice progress.
Pairs with: Chords
Cadence ear-trainer NEW
Hear a short phrase and name how it lands — perfect, plagal, imperfect or interrupted. Each opens on the tonic so you judge the cadence in context. Adaptive and scored.
Pairs with: Chords
Sight-singing grader NEW
A one-bar phrase appears in notation. Hear it, then sing it in time with the count-in — the mic grades each note for pitch (octave-free) and whether you landed it on the beat.
Pairs with: Intervals
Polyrhythm NEW
Two pulses in one bar — 3-against-2, 4-against-3 and more. Each beat lights as it sounds, so you can finally see how the cross-rhythm lines up only on the downbeat.
Pairs with: Time & rhythm
Singing pitch trainer NEW
A target note appears and you sing it back — the mic shows instantly whether you are on the note and how sharp or flat. Hide the staff, the name or the sound to make it harder.
Pairs with: Intervals
Tuner NEW
A chromatic tuner that listens through your mic. Pick cello, violin, guitar and more to tune each string to a movable reference A, or stay chromatic to check any pitch — useful for brass pitching too.
Pairs with: The stave & notation
Trumpet fingerings NEW
The whole fingering chart as a matrix — valve combinations down the side, embouchure partials across the top, the note each pairing plays in the grid. Tap any cell to hear it.
Pairs with: The keyboard
Groove machine NEW
Drums, bass and chords on one looping bar. Pick a chord per beat, a drum pattern and a bass style, and hear them lock into a groove — the drum kit, bassline and chord labs brought together.
Pairs with: Chords & harmony
Latin percussion NEW
A clave-locked percussion section: son and rumba clave, the bongo martillo, timbale fills and cowbell on the beat. Generate variations and hear how every part answers to the two-bar clave.
Pairs with: Time & rhythm
Grooves & styles guide NEW
What the clave is, who plays what in a Latin section, the drum kit, and the piano and bass roles — with a button on everything so you can hear each rhythm and instrument. The reference behind the band labs.
Pairs with: Chords & harmony
Circle of fifths NEW
Tap any key to hear it and watch the sharps and flats accumulate one step at a time. Jump to the relative minor on the inner ring, or play a ii–V–I in whatever key you land on. Modulation as movement.
Pairs with: Keys & scales
Reharmonizer NEW
Take a plain diatonic progression and reharmonise it — secondary dominants, tritone substitutions, relative swaps and borrowed chords — then hear the before and after with every change explained. Export the result as MIDI or share it as a link.
Pairs with: Chords
Voice-leading checker NEW
Write a four-part progression and the checker flags the classic faults — parallel fifths and octaves, overlaps, spacing, voice crossing and an unresolved leading note — then lets you nudge voices to fix them and hear the result.
Pairs with: Chords
Melody harmonizer NEW
Sketch a melody in C major and watch chords appear underneath — each one contains the note above it, the bass moves by strong falling fifths, and the last bar reaches for a cadence. Hear it, reshuffle the fit, export MIDI or share.
Pairs with: Chords
Arrangement builder NEW
Build a whole piece. Design sections that each pair a drum groove with a chord progression, arrange them into a verse–chorus form, and play the lot end to end — then export the arrangement as a multi-track MIDI file.
Pairs with: Chords
Progression sandbox NEW
Tap Roman numerals into a timeline, hear them played by a small band, and get nudged about how each chord wants to move — V wanting I, ii setting up V, the half cadence left hanging.
Pairs with: Chords & harmony
Clap-back game NEW
The app taps a rhythm; you tap it back on the pad in time, and it scores how close each hit lands. Five levels from steady crotchets to syncopation.
Pairs with: Time & rhythm
Triple link NEW
One note shown three ways at once — a piano key, a dot on the staff, and a frequency in hertz, all lit together. Slide the frequency and watch the named note snap as the pitch glides.
Pairs with: Pitch & notation
Parallel fifths NEW
Move two voices and the app flags parallel fifths and octaves as they happen, with a plain-English verdict on each move — then hear why classical harmony forbids them and rock is built on them.
Pairs with: Chords & harmony
Backing band NEW
A whole rhythm section from one chord progression — piano, bass, drums and percussion, generated together and locked, in salsa, funk, rock and jazz. The bass and piano always read the same chords.
Pairs with: Chords & harmony
Printable manuscript paper
Build a blank A4 stave sheet — pick treble, bass or both clefs, a time signature and bar lines — then print it, save it as an image, or share it to WhatsApp or email.
Tool · Print & practise
Melody shaper BETA
Compose a short tune the easy way: tap its rhythm to a metronome, then slide each note up or down in semitones on a contour graph — every melody is just a rhythm and a shape. Then hear it played back.
Tool · Compose & hear
Rhythm trainer BETA
A game for your sense of time: hear a rhythm played on a woodblock, then tap it straight back. You're scored on how accurately every tap lands, with Easy, Medium and Hard levels.
Game · Test your timing
Conductor BETA
Take the podium: hold the baton and swipe it through the real beat pattern for 2/4, 3/4 or 4/4, keeping time with the metronome. Follow the glowing guide and you're scored on how tightly you conduct.
Game · Conduct in time
Every scale is a shape
Plot any scale as a graph — step number across, semitones above the root going up. Overlay the major, harmonic minor and whole tone and you immediately see why harmonic minor sounds so dramatic: that steep kink at degree 6.
Pairs with: Essentials · Scales · Advanced · Minor & modes
The scale pattern machine
One rigid pattern that slides. Choose from major, all three minors, or any of the seven modes — tap any key to move the tonic and watch the pattern hold its shape.
Pairs with: Essentials · Scales & patterns · Advanced · Modes
Intervals are distances
An interval is an elastic band of fixed length. Slide it anywhere — the names change, the sound of the distance does not.
Pairs with: Essentials · Scales & patterns
Chords are stacked distances
A triad is two intervals glued together: 4+3 is major, 3+4 is minor. Watch one note slide a semitone and hear the light change.
Pairs with: Essentials · Chords
The circle draws itself
Jump a fifth, gain a sharp. Repeat. The circle of fifths is not a chart someone designed — it is generated, and you can watch.
Pairs with: Essentials · The circle of fifths
Time signatures are grouping
Six identical quavers, grouped 2+2+2 or 3+3. The grouping is the only difference — and it is the whole difference.
Pairs with: Essentials · Time & rhythm
Metronome
Visual and audio beat with tap tempo. Set any number of beats per bar; switch to compound feel for dotted-note beats in three (6/8, 9/8, 12/8).
Useful across the whole course
Rhythm builder
Fill four bars of 4/4 one beat at a time from a palette of one-beat patterns — crotchets, quavers, triplets, semiquavers, dotted and triplet figures — then play it back at any tempo and watch each note head light up.
Pairs with: Time & rhythm
Drum-kit loop
Build a one-bar groove on four voices at once — hi-hat, snare, bass drum and crash. Load a rock, jazz or half-time shuffle preset, tweak it, then save your bars in eight slots for the arranger.
Pairs with: Time & rhythm
Drum arranger
Chain the one-bar loops you saved in the Drum-kit lab into a sixteen-bar piece — drag each saved bar into the arrangement, then play the whole thing back.
Pairs with: Time & rhythm
Pentatonic & blues transposer
The five-note scales that the pattern machine doesn't cover — major and minor pentatonic plus the blues scale. Pick any tonic, see the notes, hear the difference.
Pairs with: Advanced · Beyond major & minor
The rotation machine
Seven fixed notes, a movable home. Modes and the relative minor are the same set read from a different starting note.
Pairs with: Advanced · Modes
The chord factory
Stack thirds on every scale degree and the qualities fall out in a fixed order: M–m–m–M–M–m–dim, in every key.
Pairs with: Essentials · Chords
The cadence fork
Same approach, four endings. Where the ball comes to rest — home, the rim, or the shelf — is the cadence.
Pairs with: Essentials · Cadences
The clash detector
Toggle notes; red links mark semitone neighbours. The pentatonic is the biggest clash-free set you can build.
Pairs with: Advanced · Scales
Blues construction
Minor pentatonic plus one deliberate clash: the ♭5. Generate licks with and without the grit.
Pairs with: Advanced · Beyond major & minor
The ornament decompiler
Trills, mordents, turns and grace notes are macros. Pick a sign and watch it expand into the literal notes.
Pairs with: Essentials · Ornaments
The melody slider
A tune is a shape. Transposition is sliding the shape — every interval inside it survives the move.
Pairs with: Essentials · Melody & modulation
Time signature families
Simple splits beats in two; compound in three. Six independent loops at one shared beat speed.
Pairs with: Essentials · Time & rhythm