Left Right Speaker Test
Check your left and right speakers are working and correctly placed.
Which speaker is which
This plays sound distinctly from the left and right channels so you can confirm each speaker works and is on the correct side. It is a quick check for setting up speakers or headphones, or diagnosing an audio problem.
Play the left and right test sounds to check each side.
A simple check that catches real problems
This basic test catches a handful of common and annoying problems. It confirms both speakers are actually working, since a dead channel is easy to miss until you test it deliberately. It reveals swapped channels, where left and right are reversed — a surprisingly common wiring or setup error that subtly ruins stereo sound, making instruments and effects appear on the wrong side. And it confirms your speakers or headphones are placed and worn the correct way round, since headphones in particular are easy to put on backwards. Doing this test when setting up a new system, plugging in headphones, or troubleshooting audio that sounds wrong is a quick way to rule out these simple but real issues before assuming something more serious. It takes seconds and can save a lot of confusion, since a swapped or dead channel is exactly the kind of problem that is obvious once tested but easy to overlook otherwise.
Common questions
What problems does this test catch?
A dead speaker, swapped left and right channels, and speakers or headphones worn or placed the wrong way round — simple issues easy to miss until tested.
Why are swapped channels a problem?
They reverse the stereo image, putting instruments and effects on the wrong side, which subtly ruins how stereo audio is meant to sound.
Is anything uploaded?
No. The sounds are generated in your browser.