Left / Right Speaker Test
Confirm your left and right channels are wired and playing correctly.
Status
IDLE
You should hear the tone only in the channel you selected.
Your test runs locally in your browser. No device data is uploaded.
How to use the left / right speaker test
Play the left channel and confirm the sound is only on your left, then repeat for the right, then check both together.
What this test checks
The tone is panned fully to one channel, so a correctly wired stereo setup plays it in that side only.
Hearing sound in the wrong side means the cables or headphones are swapped, or the audio driver has channels reversed.
Hearing both sides during a single-channel tone usually means the output is being downmixed to mono.
Common left / right speaker problems
Swapped channels are usually a cabling issue. A silent channel points to a broken connector or a damaged headphone wire.
Frequently asked questions
- My channels are swapped. What causes that?
- Usually wiring rather than a fault: speaker cables crossed at the back, an adapter that reverses the channels, or headphones worn the wrong way round. On a desktop setup it is worth checking the physical connections before anything else.
- One channel is silent. Is the speaker dead?
- Not necessarily. Swap the two speakers or turn the headphones around and run the test again — if the silence follows the speaker, that side has failed; if it stays on the same side, the problem is the cable, the port, or a balance setting shifted fully to one side.
- I hear a faint sound from the other side too. Is that normal?
- With speakers, yes — sound crosses the room and reaches both ears no matter which speaker produced it. Headphones give a much cleaner result, so use them if you need certainty.
- Why does this matter if both speakers work?
- Because reversed channels are almost impossible to notice in ordinary listening but quietly wreck anything positional — a film mix, or hearing footsteps on the correct side in a game.