SPATIAL / FREE BROWSER TOOL
Connect your surround system, choose 5.1 or 7.1, and test each speaker position. We check the channel capacity reported by your browser before sending discrete audio; a stereo output cannot run a genuine surround test.
Check the current browser output before playing.
YOU
listening position
Uses discrete channels, not headphone virtualization. For 5.1, the surround pair may be behind or beside you. Keep the LFE test low.
Ready. Configure the physical output in system sound settings.
The reported maximum channel count is the browser’s output capacity, not proof of how many speakers are connected. HDMI configuration, drivers, receivers, spatial audio modes, and browser support affect the result. Even an eight-channel report needs a physical listening check.
This test follows Web Audio channel order: front left, front right, center, LFE, surround left, surround right, then rear left and rear right for 7.1. On a 5.1 system the surround pair may be positioned at the side or rear. LFE uses a short 60 Hz tone at the same conservative digital gain; bass management can redirect low frequencies. Never raise the level just because LFE is quiet.
Only if its active output and browser expose at least eight discrete channels, often through HDMI or an external interface. Built-in speakers usually expose two. We block a 7.1 sequence when fewer than eight channels are reported.
The active system output may be stereo, the surround layout may not be configured, or the browser and driver may expose only stereo. Select a multichannel device in system settings and check the output again.
No. This page routes a synthesized tone to one discrete output channel at a time. It does not simulate surround positions over stereo headphones. Your operating system or receiver can still remap or downmix the output.
A subwoofer crossover, receiver setting, room position, or device filter may affect the 60 Hz LFE tone. Quiet output does not justify increasing volume aggressively. Check the receiver configuration first.