How this test works
Generates a local Web Audio oscillator only after a button press.
User-confirmedPrecision label
P0 browser diagnostic
Speaker & Headphone Test
Play a safe tone through the left, right or both audio channels.
User-confirmedBrowser-nativeLocal processing
SP
Interactive test
Speakers diagnostic
◆Stays on deviceNo raw hardware upload
L
R
Your data flow
Generated sound stays local and no microphone permission is requested.
Read the privacy overview →What this cannot prove
- The browser cannot hear your speakers without microphone loopback.
- Output-device selection varies by browser.
Fix common problems
- Check system volume, mute and selected output.
- Inspect balance settings if one side is missing.
- Check the cable or headset orientation if channels are reversed.