KOEN

4-Key Rhythm Game

GAME · 4K RHYTHM

Hit falling notes on the beat with D, F, J, K or by tapping. Three songs synthesized live in your browser, with Perfect/Great/Good judgements, combos and ranks.

SELECT TRACK

No audio files here: your browser synthesizes every song live. Turn your sound on 🔊

×
ms
Tap each lane with your finger · multi-touch works

HOW TO

How to use

  1. Pick one of three songs, Easy, Normal or Hard, and set your note speed.
  2. Press Start. After a short intro the notes begin to fall. Play with sound on.
  3. Press D, F, J or K, or tap the lane on mobile, the moment a note reaches the line at the bottom.
  4. At the end you'll see your score, accuracy, max combo and rank. Your best score for each song is saved.
PAIRS WELL WITH

Pairs well with

FAQ

FAQ

How is timing judged?

Within 40 ms of the note is Perfect, 80 ms Great and 125 ms Good. Letting a note pass is a Miss. A perfect run scores 1,000,000 points.

The notes feel out of sync with the music.

Timing follows the audio clock, so it matches the sound. Bluetooth headphones add delay, so if you're always judged late, move the Timing offset toward +. Wired headphones or speakers are most accurate.

Does it download music files?

No. Drums, bass and melody are synthesized on the spot with Web Audio. The songs and note charts are the same every time, so practice pays off.