Theory · Intervals
Compare two notes. Understand the distance.
Choose two notes to find their interval. See how the written note names, semitones and sound relate.
Frequency ratio: 1.498× between the lower and higher pitch. Enharmonic spelling changes the written interval name, not the sound.
Select which note to edit above, then tap the piano key. Both selected pitches stay highlighted.
Understanding intervals
Semitones and notation answer different questions.
A musical interval has a diatonic number (the letter-name distance) and a quality such as perfect, major, minor, diminished or augmented. Two enharmonically equivalent pitches may produce the same sound but require different interval names on a score.
Use “Hear one after another” to practise melodic intervals, or “Hear together” for harmonic intervals. The displayed semitone count is the absolute chromatic distance; direction is shown separately.