Headset test
Stereo + microphone
Check one headset path.
Use the intended connection mode. Record what you hear before and while microphone capture is active; a changed result can be consistent with an input-related mode change, but this browser cannot prove a Bluetooth profile switch.
Web Audio is unavailable in this browser.
Microphone activation
Compare before and during capture.
MicrophoneMicrophone access has not been requested.
After allowing the microphone, replay the same reference to check whether headset output changes during capture. This cannot identify the Bluetooth profile.