Train your ear.
No soundbanks. Pure mathematical audio.
Interval is an interactive auditory training companion for guitarists, pianists, and music theory students. Identify intervals, study chord formulas, explore a 12-fret guitar neck, and practice with a tactile metronome.
5 Dedicated In-App Screens
Complete audio education suite executing entirely without audio sample downloads or microphone listening.
Interactive Ear Trainer
Guess interval jumps (Minor 2nd to Octave) with tactile feedback cues, mnemonic references, and real-time accuracy scoring.
Chord Formulas Guide
Music theory harmonic reference covering Major, Minor, Dom 7th, Maj7, Min7, sus4, and Diminished chord formulas with mood descriptions.
Guitar Fretboard Map
Standard 6-string guitar fretboard visualizer across frets 0-12 with root note highlighting and chromatic note identification.
Tactile Metronome
Low-latency tempo keeper with BPM slider (40-220 BPM), visual beat indicators, and time-signature accents.
Circle of Fifths Reference
Harmonic relationship wheel showing major keys, relative minor keys, and key signature accidentals (sharps and flats).
100% Private Listening
Interval never records audio or captures microphone input. All sounds are synthesized locally in code.