What is Scale Reference?

Scale Reference is a quick-lookup tool for musicians showing notes, intervals, and patterns for dozens of musical scales. Select a root note and scale type to see every note in the scale with its interval relationship.

The library covers fourteen scales: major, natural, harmonic and melodic minor, major and minor pentatonic, blues, the church modes (Dorian, Phrygian, Lydian, Mixolydian, Locrian), whole tone, and diminished. A Play button audibles the scale through a sine oscillator so you can hear the colour before you commit to using it in a track or solo. Every view also shows the diatonic chords built on each scale degree with Roman-numeral analysis, a one-tap jump to the relative major or minor, and parallel scales sharing the same root so you can compare modes side by side.

How to use

1. Step 1 — Select a root note (C, C#, D, etc.) from the note selector.
2. Step 2 — Choose a scale type (Major, Minor, Pentatonic, Blues, Dorian, etc.) from the scale list.
3. Step 3 — Explore the notes, intervals, semitone pattern, diatonic chords with Roman numerals, piano keyboard, guitar fretboard, staff notation, relative key shortcut, and the parallel scales sharing the same root.

When to use

• Working out which notes are safe to solo over a given chord on guitar or piano.
• Comparing modes side by side, like D Dorian versus D natural minor, to feel the b6 difference.
• Picking a scale that matches a mood, like Lydian for bright or Phrygian for tense and Spanish-flavoured.

Result

A guitarist selects D as the root note and Mixolydian as the scale. The tool shows D E F# G A B C with intervals 1 2 3 4 5 6 b7, perfect for playing over dominant 7th chords.

FAQ

What's the difference between major pentatonic and the regular major scale?

Major pentatonic drops the 4th and 7th, leaving five notes with no semitone clashes. That makes it almost impossible to play a wrong note over a major chord, which is why it's the go-to for blues, country, and pop solos.

How do the church modes relate to the major scale?

Each mode starts from a different degree of the major scale. C major starting on D gives D Dorian, starting on E gives E Phrygian, and so on. Same notes, different tonal centre, completely different vibe.

Why are the intervals shown with flats like b3, b5, b7?

Intervals are written relative to the major scale of the same root. A b3 means the third degree is lowered a semitone from the major reference. This shorthand makes it easy to spot what gives minor or blues their distinctive sound.

Does the playback work on every device?

Yes. The playback uses the Web Audio API, which works on every modern phone, tablet, and computer. The note quality is intentionally plain, a clean sine wave at 440 Hz reference pitch, so you hear the intervals without the colour of a particular instrument.

Why does the same scale show different notes when I change the root?

A scale is a pattern of intervals, not fixed notes. Major scales all share the same step pattern (whole-whole-half-whole-whole-whole-half), so the notes shift with the root: C major has no sharps, G major has one (F#), D major has two.

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