Test Mode
Test Level
Averages
Speed Of Sound
ft/s
Actions
Audio Delay Alignment
READY
Click Enable Mic first. Browser mic access requires HTTPS, localhost, or file permissions.
Step 1: Enable Microphone
Click the button, then choose Allow when your browser asks for microphone access. If no popup appears, check the address bar permission icon.
Left Arrival
Right Arrival
Difference
— ft · — m
Suggested Delay

If you see Permission denied: click the lock/tune icon in the browser address bar, allow Microphone, then reload. Chrome/Edge usually require HTTPS or localhost. Opening a local file may work in some browsers but not all.

S settings · F fullscreen · Space start test · Esc stop