What the tool does, how to run it, and what to expect from the result.
Press Left: the chime should come only from the left earpiece or speaker. Right should come only from the right, and Both from the centre. The moving sound travels from left to right and back. If sides are swapped, the headphones are on backwards, the speaker cables are crossed, or a balance or mono-audio setting is on.
A quick way to understand who this helps, what it solves, and where it connects next.
Gamers, PC builders and anyone checking a device before a warranty claim.
Using the left right audio test without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Mono audio is switched on (an accessibility setting on phones and computers), or the device is a single speaker. Turn mono off to hear stereo.
Most are marked L and R on the stem or inside the bud.
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Start at a low volume and turn it up. Sounds are generated in your browser; nothing is recorded.
Left should come only from the left ear or speaker, Right only from the right. If they are swapped, check the headphone orientation and the balance slider in your sound settings.