Audio
Interactive · Runs in this browser
Play an auto-stopping reference tone in only the left channel, only the right channel, or equally in both. Use it to check stereo orientation, cable or earbud output, channel balance clues, and audio routing.
Speaker test
Play a local stereo tone to check the left and right speaker channels. No audio leaves this device.
Start with a low device volume. Remove headphones before testing loud speakers, and stop immediately if the tone is uncomfortable.
Channel
Left + right
Tone
440 Hz
Auto-stop
3 s
Ready. The test tone will stop automatically after three seconds.
Transparent method
This tool reports only interactions and browser APIs it can observe. It does not infer hidden hardware specifications or turn unsupported access into made-up results.
Useful context
The same signal is sent to both channels, so it should sound centered when channel balance and headphone placement are even.
It can reveal missing or intermittent channel output, but another source and cable should be tested before identifying the cause.
Troubleshooting
Keep checking