Surround sound test.
Check a 5.1 speaker layout one channel at a time. First check your browser’s output capability, then choose discrete surround or a clearly labeled stereo preview.
Output capability has not been checked. Stereo preview is the default.
Start low. Your system volume also affects loudness.
Capability is not proof of physical speaker routing.
Ready. No sound plays until you choose a test.
Main channels: 440 Hz · LFE: 65 Hz · select the 5.1 output in your system settings first.
What this 5.1 surround sound test does
Discrete mode creates a six-channel audio buffer with a tone in only the selected channel. It uses the Web Audio 5.1 ordering: front left, front right, center, low-frequency effects (LFE), surround left, and surround right. Main channels use a 440 Hz tone; the LFE test uses 65 Hz. The diagram identifies the intended channel, and you confirm the actual result by listening.
Discrete surround versus stereo preview
Check output support reads the maximum channel count the browser exposes for its current audio destination. Discrete 5.1 can be selected only when that count is at least six. Stereo preview maps left-labeled speakers to the left stereo channel, right-labeled speakers to the right, and center/LFE to both. It does not simulate rear localization and cannot validate six physical speakers.
Why a 5.1 system may expose only two channels
The selected browser or operating-system output may be configured as stereo. A Bluetooth connection, HDMI handshake, USB device, audio driver, or receiver input can also limit what is exposed. Configure the output in your system settings, then reload the page to create a fresh audio context and check again. Read the surround setup guide for the complete signal path.
Interpreting the subwoofer and channel results
Bass management can send a main-channel tone to the subwoofer, and a receiver may reroute the LFE tone. Hearing bass is not proof that LFE is isolated correctly. Disable upmixing or virtual surround when checking physical routing, and compare with your operating system or receiver’s own channel test. This browser test does not measure speaker distance, room correction, level calibration, Dolby Atmos objects, or 7.1 routing.
Good questions.
Clear answers.
Does this play genuine discrete 5.1 audio?
When your browser exposes at least six output channels and you choose Discrete 5.1, the test sends a six-channel buffer with only the selected channel active. Your operating system and receiver still control the physical mapping.
Why is Discrete 5.1 disabled?
Check output support first. The option stays disabled if the browser exposes fewer than six channels. Select a suitable output, configure it for 5.1, reload, and check again.
Can I test surround on ordinary headphones?
You can use the labeled stereo preview to hear channel cues, but it does not verify physical surround speakers or provide a binaural surround simulation.
Does this support 7.1 or Dolby Atmos?
This release checks a standard six-channel 5.1 layout only. It does not claim to test 7.1 speaker routing or Dolby Atmos object audio.