Play browser audio cues to check left, right, and simulated speaker positions. Most browser audio output is stereo, so this is not a native surround decoder test.
Test each speaker channel in your stereo or surround sound setup. Play a 440 Hz tone through each channel individually or cycle through all channels automatically to verify correct routing, placement, and output level.
Click a speaker in the diagram to test it
Each channel test plays a 440 Hz sine wave tone for 2 seconds through the target channel using the Web Audio API'sStereoPannerNode. Left and Right channels pan to -1 and +1 respectively. Center pans to 0 (both channels equal). Surround channels use intermediate pan values to place audio in the left-rear or right-rear field. For true multi-channel surround (5.1+), a dedicated multi-channel audio interface is required — browser audio is inherently stereo in most configurations.
Front left speaker. Carries left stereo content, ambient effects, and panned audio elements.
Front right speaker. Carries right stereo content, ambient effects, and panned audio elements.
Center speaker. Primarily carries dialogue, main on-screen vocals, and centered audio.
Rear left speaker. Carries ambient environment audio and surround effects from the left rear.
Rear right speaker. Carries ambient environment audio and surround effects from the right rear.
Low frequency effects channel. Carries bass frequencies 20–120 Hz for impact and depth. Not included in browser panning.
More free tools to check your setup.
Test speakers, headphones, left/right stereo channels, frequency sweep, bass, and microphone input online.
Non-calibrated browser hearing range screening with tones from 125 Hz to 16000 Hz. Compare left/right perception and learn when a clinical audiogram matters.
Test your subwoofer and speakers with low-frequency tones from 20 Hz to 200 Hz. Find the lowest bass your system can reproduce.
Test headphone channel balance, frequency sweep, and phase response. Verify left/right audio and stereo imaging.
Free microphone test online. Check mic input level, peak clipping, and live waveform in your browser.
Guides on speaker setup, surround sound configuration, and audio calibration.
If an online keyboard tester does not detect one key, several keys, or modifier combinations, start with focus, layout, browser shortcuts, rollover limits, and hardware checks.
A browser GPU stress test can reveal crashes, throttling, noisy fans, and WebGL issues, but it cannot replace tools that read sensors, VRAM errors, or driver-level stability.
If a refresh rate test reports 60Hz on a 144Hz or 240Hz monitor, check OS settings, cable limits, browser throttling, VRR, duplicated displays, and power mode.
Mouse polling rate tests can jump between values because of movement speed, DPI, browser event delivery, wireless mode, CPU load, and USB power settings.
If a browser gamepad tester does not detect an Xbox, PlayStation, Switch, or generic controller, check connection mode, browser support, focus, permissions, and Steam input.
If an online microphone test cannot hear you, check browser permissions, the selected input device, OS privacy settings, exclusive mode, Bluetooth headset profiles, and HTTPS.