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Intervals · P5 ·

Perfect fifth

A perfect fifth is seven semitones, the distance from C up to G. It is the first leap in "Twinkle, Twinkle, Little Star," from the first "twin-" to the second.

Listen: C4 and G4

Quiz

Wormy plays one of these, up or down, from a different note each time. Can you tell which: tritone, perfect fifth, minor sixth?

What it sounds like

Seven keys apart, hollow and steady, like an open field. Two notes a fifth apart blend so well they almost sound like one.

In music theory

Do up to sol is the strongest pull in tonal music. A power chord is just a root and its fifth, violins tune their strings in fifths, and each step around the circle of fifths is one.

Where you've heard it

  • Twinkle, Twinkle, Little Star: "twin-kle, twin-," do up to sol, going up.Traditional. The French tune "Ah! vous dirai-je, maman" (printed 1761), with Jane Taylor's English words (1806).

Every tune named here is public domain in the US or traditional. Wormy names the spot; it never plays the song.