Scale Finder
Explore scale structures, note intervals, and view active scale notes on a virtual piano keyboard.
Interval Calculator
Calculate musical intervals, semitones count, and exact pitch frequencies ratios.
Select Boundary Notes
Melodic Play triggers the boundary notes sequentially. Harmonic Play triggers them together at the identical start time, creating a chordal interval tone.
Calculated Interval
Perfect Fifth
Semitones Displacement
7 semitones
Frequency Quotient Ratio
1.50:1 (3:2)
Pitch Hertz Value (N1 ↔ N2)
261.63 Hz ↔ 392.00 Hz
Consonance Grade
Perfect Consonance
Understanding Musical Intervals & Harmonies
Measure semitone distances and intervals between notes, view distance on keyboard, and check consonance status.
An interval is the difference in pitch pitch between two musical notes. Measuring these mathematical structures is crucial for voicing chords, composing melodies, and resolving harmonies:
- Consonance vs Dissonance: Consonant intervals sound pleasant and restful (e.g. Perfect Octaves, Perfect Fifths, Major Thirds). Dissonant intervals create acoustic friction and demand resolution (e.g. Tritones, Minor Seconds).
- Pythagorean Ratios: Standard physics demonstrates that consonant intervals have simple integer frequency ratios. An octave is exactly 2:1. A perfect fifth is exactly 1.5:1 (3:2).
- Melodic vs Harmonic: Melodic intervals occur when notes are played consecutively. Harmonic intervals occur when notes are sounded simultaneously.
Frequently Asked Questions
What are consonant intervals?
Acoustically stable intervals (like major thirds, perfect fifths, octaves) that sound pleasant and resolved.