Quick answer
What Stereo Sound Test tells you
Move a controlled tone between left, center and right to check stereo imaging and channel balance.
- Observed here
- Left-to-right positioning, Centered playback, Channel balance.
- How to interpret it
- Left, right and centered tones provide a reference for channel separation. Mono settings, spatial processing or output routing can alter their apparent position.
- Important limit
- Results reflect events and values exposed by this browser.
- Data handling
- Test values are calculated in this browser. Device Test Bench does not store a test result or create a device fingerprint.
Useful next comparison: Compare all three positions at low volume and check mono or spatial-audio settings before assigning a hardware cause.
Understanding the result
What a result means
The moving position checks whether left, center and right cues remain distinct. Room reflections, speaker placement and mono processing can collapse the image even when both electrical channels are present.
Confirm the pattern by repeating left-to-right positioning. Results reflect events and values exposed by this browser.
How to use this test
- Read the privacy and compatibility notes.
- Start the test and interact only inside the marked test area.
- Repeat the action several times and compare the live indicators.
- Use the troubleshooting section before deciding that hardware is faulty.
What this test checks
- Left-to-right positioning
- Centered playback
- Channel balance
- Volume and stop controls
What this test cannot check
Results reflect events and values exposed by this browser.
This test does not certify hardware or replace professional inspection.
Room acoustics and speaker placement change perceived imaging.
Common problems and troubleshooting
Sit centered, lower background noise and compare the center with each side. Disable mono audio or spatial enhancement temporarily and repeat with headphones to separate room effects from channel routing.
- Repeat the same observation. Focus the test surface and repeat “Left-to-right positioning” three times under the same conditions.
- Change one condition. Compare “Centered playback” after changing only the relevant port, connection, browser setting or application.
- Rule out focus or interception. Close overlays and reserved shortcuts, keep the page visible and confirm that the live indicator changes during the action.
- Keep the result within its limit. Results reflect events and values exposed by this browser.
If the same pattern remains across relevant applications and connections, give the manufacturer or a qualified technician the repeatable observations instead of a guessed fault label.
Browser compatibility
The test uses StereoPanner in Web Audio. Browsers that support Web Audio can generate the positions, but downstream operating-system enhancements or Bluetooth profiles may alter the final image.
| Browser | Reference status | Evidence basis | Version | Notes | Checked |
|---|---|---|---|---|---|
| Chrome | Supported | Expected baseline | Not recorded | Feature detection is authoritative; permissions, platform and device support can change availability. | 2026-08-27 |
| Microsoft Edge | Supported | Expected baseline | Not recorded | Feature detection is authoritative; permissions, platform and device support can change availability. | 2026-08-27 |
| Firefox | Partial | Expected baseline | Not recorded | Feature detection is authoritative; permissions, platform and device support can change availability. | 2026-08-27 |
| Safari | Partial | Expected baseline | Not recorded | Feature detection is authoritative; permissions, platform and device support can change availability. | 2026-08-27 |
Privacy information
Test values are calculated in this browser. Device Test Bench does not store a test result or create a device fingerprint.
The public analytics allowlist does not accept pressed keys, typed text, pointer coordinates, media labels, device IDs, recordings, video frames or controller input. Test results are not written to LocalStorage.
Primary technical references
These specifications define the browser signals used by this test. They document web-platform behavior; they do not certify a particular device.
Frequently asked questions
Is this Stereo Sound Test free?
Yes. The test works without an account, download or payment.
Is my test data uploaded?
Test values are calculated in this browser. Device Test Bench does not store a test result or create a device fingerprint.
Does this result prove my hardware is faulty?
No. It shows what the browser can observe. Repeat the test, compare another browser or device, and seek qualified support when the result matters.