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Harp

Fraction ratios · 30 levels

Cut strings to fractions and the harp sings the tune.

How to play

1. Tap a fraction card, then a string: the bridge leaves that fraction of the string sounding. Tap a string to pluck it.
2. A shorter string sings higher: pitch × 1 ÷ fraction. ½ sounds ×2 (an octave), ⅔ sounds ×3/2 (a fifth).
3. Tune every string to its coloured target bar. Later strings take two bridges: ⅔ of ¾ = ½.

Tap a string's label at the bottom to take its last card back. ▶ plays the target tune, and equal fractions like 4/6 and 2/3 sound the same.

Open Harp

Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.