Scale Explorer : See, Hear, and Compare Musical Scales

The Bones of a Good Song: Scale Explorer and Harmony

Scales are the building blocks of music, the blocks in fact that every musician must master. Every song you’ve ever heard uses notes from a scale, and understanding scales unlocks both playing and writing music.

This tool lets you see, hear, and compare 14 different scales across all 12 keys. A full keyboard, chord wheel, and melody composer can be found here.

Getting Started

Choose a root note (the starting note of your scale) and a scale type from the dropdowns. The keyboard will highlight which notes belong to that scale, with the root note emphasized.

Click Play Up to hear the scale ascending, Down for descending, or Both to hear it go up and back down. Click any highlighted key to play individual notes.

What You’ll See

Scale degrees appear on each highlighted key (1, 2, 3, etc.). These numbers tell you the note’s position in the scale. The root is always 1.

Interval pattern shows the steps between notes:

• W = Whole step (2 piano keys apart)
• H = Half step (1 piano key apart)
• m3 = Minor third (3 piano keys apart)

This pattern is what gives each scale its unique sound. Major scales follow W-W-H-W-W-W-H. Change one step and you get a completely different mood.

Chords Built on the Scale

For 7-note scales, you’ll see the seven chords that naturally occur when you stack notes from that scale. This is how songwriters know which chords “go together.”

• Uppercase numerals (I, IV, V) = major chords
• Lowercase numerals (ii, iii, vi) = minor chords
• ° symbol = diminished chord

Click and hold any chord to hear it. In C Major, try the classic I-V-vi-IV progression (C, G, Am, F) — you’ve heard it in hundreds of songs.

Comparing Scales

Click Compare Scales to see how two scales differ.

The keyboard shows three colors:

• Green = note is in both scales
• Blue = only in the primary scale
• Red = only in the comparison scale

Try these comparisons:

• C Major vs C Mixolydian — one note different (B becomes B♭), completely different vibe
• C Major vs A Natural Minor — same notes, different starting point (relative major/minor)
• C Natural Minor vs C Dorian — one note different (A♭ becomes A), Dorian sounds more hopeful

Loop Mode

Click the Loop button to keep the scale repeating. Useful when you want to play along, practice intervals, or just absorb the sound.

The Scales

Common Scales

• Major — The happy, resolved sound. Do-re-mi.
• Natural Minor — Sad, serious, introspective.
• Major Pentatonic — Five notes that always sound good together. Folk music worldwide.
• Minor Pentatonic — The foundation of blues and rock soloing.
• Blues — Minor pentatonic plus the “blue note.” Gritty and expressive.

Modes (scales derived from major by starting on different notes)

• Dorian — Minor but hopeful. Jazz, funk, Celtic.
• Phrygian — Spanish, exotic, dark. Flamenco.
• Lydian — Dreamy, floating. Film scores use it for wonder.
• Mixolydian — Bluesy major. Classic rock swagger.
• Locrian — Unstable, dissonant. Rarely used as a home base.

Other

• Harmonic Minor — Classical drama, Middle Eastern flavor.
• Melodic Minor — Smooth jazz sophistication.
• Whole Tone — Dreamy, unresolved. Suspense and mystery.
• Chromatic — All 12 notes. Not for composing in, but useful for reference.