R Resonance Music Theory

Theory You Can Hear

Learn scales, intervals, chords, and harmony with an interactive keyboard, ear training drills, and compositional exercises.

Play & Learn

What We Offer

🎹

Virtual Piano

Play scales, chords, and progressions on a full 88-key interactive keyboard with notation display.

👂

Ear Training

Identify intervals, chords, scales, and chord progressions by ear with progressive difficulty levels.

🎼

Score Reader

Follow along with annotated scores highlighting harmonic analysis, form, and compositional techniques.

🎵

Chord Lab

Build and voice chords, create progressions, and hear them played with different instrument timbres.

3,000+
Exercises
200+
Score Analyses
88%
Ear Training Improvement
4.9/5
Student Rating

What Learners Say

Being able to hear chord progressions while seeing the Roman numeral analysis was transformative.
Ms. Park, AP Music Theory
The ear training module improved my interval recognition from 40% to 95% accuracy.
Jamie O., Grade 11

Fundamentals

Master staff notation, clefs, key signatures, time signatures, note values, rests, and rhythmic patterns with sight-reading exercises.

Harmony & Chord Progressions

Study intervals, triads, seventh chords, inversions, Roman numeral analysis, voice leading, and common progressions in major and minor keys.

Form & Analysis

Analyze binary, ternary, rondo, sonata, and theme-and-variations forms in classical, jazz, and popular music works.