Why don't I hear any sound?

Check OS volume is up and not muted, the correct output device is selected (system tray on Windows, menu bar on macOS), and your browser is not muted on the tab. Some browsers also gate audio behind a user gesture — make sure you clicked the test button after the page loaded.

How do I know my left/right channels are correct?

Use the Left and Right test buttons individually. The 440 Hz tone (or voice prompt) plays only on that channel. If you hear it on the wrong side, your physical wiring or system audio balance is reversed.

Why is the sound only in one ear?

Either the audio balance is shifted in your OS (check accessibility/sound settings), one of the speaker cables is loose, or the test was set to mono. Re-run the L/R test to confirm which side is silent.

Can I test Bluetooth speakers?

Yes. Pair the speaker with your OS first, then in the system sound output picker select the Bluetooth device. The browser test will route audio through whichever device the OS treats as default output.

Why is there a small delay before the sound plays?

Web audio engines need a few hundred milliseconds to initialize the audio context on the first play. Subsequent tests should be near-instant. Bluetooth devices add 100–300 ms of additional latency by design.

Speakers & Headphones Test

Test your speakers or headphones without leaving the browser. Play a stereo tone through each channel separately to spot any imbalance or dead side.

How to Test Your Speakers

Turn up the volume

Make sure your system volume is not muted and set to a comfortable level.

Press Test Both

Click the Test Both button to play a short 440 Hz test tone through both channels.

Check left and right

Press Test Left and Test Right separately to verify each speaker works and plays sound from the correct side.

Troubleshoot

If you don't hear a sound, check your system audio output device, cables, or Bluetooth connection.

Tips for Better Speakers Sound

Place speakers at ear level and slightly angled toward you for the best stereo image.
Keep speakers at least 30 cm away from walls to reduce bass boom.
Check the selected output device in your OS sound settings — audio may be going to HDMI or Bluetooth instead of the desktop speakers.
Disable any audio enhancements / spatial sound features if the sound seems distorted.
Use the left/right channel tests to confirm your cables are plugged into the correct jacks.