Stereo Phase Test
Use headphones or stereo speakers at a safe volume and compare with normal stereo playback.
Audio output check
Use a comfortable volume. Test tones are generated locally in your browser.
Now playingIdle
Tone440 Hz
DeviceOK can verify that browser audio reaches your selected system output path, but browsers do not reliably expose every physical speaker/headphone identity.
What happened?Choose the result you observed.
Privacy: Audio is generated locally.
What this test tells you
This test checks
- Stereo output path
- Audible phase relationship
How to read the result
Room acoustics and speaker placement affect what an out-of-phase signal sounds like.
This is not an electrical polarity measurement.