Speaker Test
Play a short, low-volume tone through left, right or both channels after a deliberate click.
Open test →AULeft Right Speaker Test
Verify that stereo left and right channels are routed in the expected direction.
Open test →AUHeadphone Left Right Test
Play distinct channel tones to check headphone stereo direction without claiming to detect whether headphones are connected.
Open test →AUStereo Sound Test
Move a controlled tone between left, center and right to check stereo imaging and channel balance.
Open test →AUAudio Output Test
Check basic browser audio playback and show output-device selection only where setSinkId is supported.
Open test →AUTone Generator
Generate a user-controlled short sine tone for basic speaker checks with conservative frequency and volume limits.
Open test →What these browser tests can tell you
These tools show events, streams and capability values made available by your browser. They are useful for reproducing a problem and comparing behavior, but they do not certify a component or replace repair diagnostics.
Run a test more than once and, when practical, compare another current browser, port, cable or device. Each tool page gives a more specific interpretation and troubleshooting sequence.