Left Channel
Not testedPlays the tone through the left channel only.
PlayingRight Channel
Not testedPlays the tone through the right channel only.
PlayingStereo
Not testedPlays Left, then Right, then Both channels.
PlayingConfirm the result yourself after listening; browser playback cannot verify physical speakers.
How to use the speaker test
Start with low device volume and keep it comfortable. Select Test Left or Test Right and listen for sound from the matching side. Test Stereo plays Left, Right, then Both. Repeat as needed at a comfortable volume and mark PASS or Fail yourself. Use Stop to end playback or Reset to clear results and restore the default tone and volume.
If one side is silent or sounds wrong
Check that system and browser sound is not muted, then check their volume, the selected audio output device, and left/right balance. Mono audio settings can also combine the channels. Reconnect headphones or external speakers if you use them, and compare playback in another browser or app. Silence or distortion in this test alone does not prove a speaker hardware fault.