Train your ears. Understand the music.
Practice intervals, chords, scales, notes, and tuning with focused listening drills—then explore harmony with playable tools for keys, progressions, voice leading, and modulation. No account or setup.
Ear training practice
Build practical aural skills with short drills for intervals, chords, scales, notes, tuning, and production frequencies.
Recognize piano chords by ear
Compare major, minor, seventh, suspended, diminished, and extended chord colors.
Start chord ear training → IntervalsHear musical distance
Build relative-pitch accuracy with replayable ascending and descending interval questions.
Practice intervals → ScalesIdentify scale patterns
Read note sets and formulas, answer quickly, and connect visual scale shapes to playback.
Take the scale quiz → PitchTrain note recognition
Practice pitch identity and build faster recall without requiring perfect pitch.
Practice notes → ProductionRecognize EQ frequencies
Compare flat and processed audio, then identify boosts, cuts, and filter cutoff frequencies.
Start frequency training → TuningFind the unstable note
Hear a familiar chord with one note nudged sharp or flat, then identify the detuned voice.
Practice tuning → Sound designRecognize synth waveforms and filters
Identify oscillator shapes, low-pass cutoff frequencies, and filter types from generated synth sounds.
Start synthesis ear training →Explore rhythm as a system
Hear simultaneous pulse groups or distribute hits evenly around a cycle with two visual, playable rhythm tools.
Polyrhythm generator and metronome
Layer two pulse groups, mute either stream, tap the missing rhythm, and share the exact pattern.
Practice polyrhythms → SequencingEuclidean and random rhythm generator
Spread hits evenly or generate a seeded variation, then hear, share, and export the exact rhythm.
Build a rhythm →One compact workflow
Each tool answers one practical question and passes naturally to the next. Start wherever your song is stuck.
Which chords fit this key?
See diatonic triads, seventh chords, extensions, and useful borrowed chords in any major or minor key.
Open key explorer → 02 · GenerateGive me a progression to start from.
Choose a key, genre, and mood. Get real chord names and Roman numerals, then hear and share the complete progression.
Generate chords → 03 · RefineHow can these chords move smoothly?
Turn chord symbols into practical keyboard or SATB voicings with less motion between voices.
Optimize voicings → 04 · ModulateHow do I move to another key?
Compare two keys, find shared chords, and hear several transition paths at your chosen tempo.
Plan a key change →Go deeper when the first idea needs work
Use focused references and analysis tools to spell chords, compare progression shapes, plan tension, and check scales.
Which notes are in this chord?
Look up triads, seventh chords, extensions, suspended chords, and altered harmony on a playable piano.
Open chord piano atlas → CompareWhat progressions feel like this one?
Compare harmonic function and chord movement to find related progressions without copying exact chord names.
Compare progressions → ShapeWhere should the harmony build and release?
Draw an energy curve and turn it into a progression with a more deliberate arc.
Design a tension curve → CheckWhich notes define this scale?
Compare major, minor, modal, pentatonic, and other scale formulas with playback.
Open scale chart →Practice one skill, then use it in music.
Progression Helper connects listening practice to harmony. Train a focused aural skill, hear the same relationships in chords and keys, and turn that understanding into a musical idea.