Interval Test · Ear Training

Learn music intervals with clear interval theory, an intuitive interval calculator, and game-like interval quizzes and ear training — with instant feedback, scores, and fun rewards.

Intervals are the language of music theory. Understanding scales, harmony, and chords starts with a solid grasp of intervals. With a few basic rules and consistent practice, anyone can learn them step by step.

This app supports step-by-step learning in four sections: Interval Theory → Interval Calculator → Interval Quiz → Interval Ear Training. Especially in the Interval Ear Training section, you can go beyond mathematical calculation and train your ears to hear the unique color of each interval and understand it musically.

📙 Interval Theory

The theory section explains interval numbers (2nd, 3rd, etc.), simple and compound intervals, harmonic and melodic intervals, inverted intervals, and interval calculation in a clear, structured way—so anyone can understand the underlying principles with ease.

📏 Interval Calculator

Once you understand the theory, try calculating intervals yourself. When you place two notes on a staff, the interval name is calculated and displayed instantly. The same notes are also shown on a piano keyboard, helping you understand intervals more intuitively. You can also set key signatures and clefs to calculate more complex intervals with ease.

🖋 Interval Quiz

You can choose options such as key signatures, accidentals, staff types, and clefs to create the kinds of interval questions you want. Build your skills by solving problems like a game—the tougher the options and the higher your score, the more dazzling the fireworks, giving you a strong sense of achievement.

👂 Interval Ear Training

It’s essential to recognize the unique “color” of each interval by ear. With practice, you can sharpen your listening skills. Choose relative or absolute pitch, melodic or harmonic intervals, difficulty level, and playback speed to create your own personalized ear-training sessions.

🎤 Interval Sight Singing

On the Interval Calculator screen, tap Play to hear the interval. Use this feature to practice interval sight singing.

1.Set the interval you want to practice on the staff.

2. Set the note length to half notes.

3. Listen to the first note, then sing the second note that you hear in your mind.

4. Compare your pitch with the correct second note played by the app.

This app was developed by a university instructor with years of experience teaching music theory. Based on a classroom-tested methodology, it offers structured, musical, and practical learning. We hope it will be a valuable resource on your musical journey.