1. Enable sound yourself
The page starts paused and muted. Select Start / resume and Enable sound. Use the volume control or Mute whenever you want.
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Explore locally synthesized key sounds in a focused sound playground.

Loading the interaction…
The page starts paused and muted. Select Start / resume and Enable sound. Use the volume control or Mute whenever you want.
Soft tone and Bright tone are original, locally synthesized sounds. They are not recordings of commercial keyboard switches.
Click an onscreen key, or focus the keyboard playground and use letter keys. Shortcuts do not run in text fields, select controls or elsewhere on the page.
Key presses trigger a tone on this device. Typed sequences are not saved or sent to an analytics service. Only sound preferences are retained locally.
Use Restart interaction in the error panel. If it still fails, reload this page and retry. Instructions remain readable.
Continue silently or select Enable sound again. Audio starts only after your action; changing a volume setting does not grant browser audio permission.
Open an image to inspect it at full size. Each caption identifies its source and version.





This silent, original-speed screen recording shows the current interaction controls. Start the round, use the labelled actions, pause, and reset only after confirmation. It does not demonstrate a physical product or play the optional sound effects.