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 your speakers, headphones, and microphone. Check left/right channels, frequency response, and audio quality.
Check your hearing range across 8 frequencies from 125 Hz to 16000 Hz. Identify which frequencies you can and cannot hear.
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.
Test your microphone in the browser. Check volume level, peak meter, and waveform visualization using getUserMedia.
Guides on speaker setup, surround sound configuration, and audio calibration.