🔊 Surround Sound Test

A surround sound test plays distinct tones through each speaker channel — front left, center, front right, surround left, and surround right — so you can verify each speaker is connected, mapped to the correct channel, and producing sound from the right position.

No. Browsers output stereo (2 channels), so this tool simulates the surround channels with a diffuse out-of-phase effect. For true 5.1/7.1 verification, use your AV receiver's built-in test tones. This tool is ideal for checking wiring, channel mapping, and speaker identification before calibration.

Play each channel and confirm the sound comes from the correct physical speaker. If the Front Left tone comes from a different speaker, your speaker wires are plugged into the wrong terminals on your AV receiver. Re-map them and re-test.

The surround (rear) channels use an out-of-phase signal that sounds diffuse and hard to localize — this mimics how rear-channel audio feels. The front channels use standard stereo panning and sound more clearly positioned.

Set your AV receiver to stereo/direct mode so all channels downmix to your front pair, and sit in your normal listening position. Keep volume moderate. If you have a real 5.1/7.1 system, use the receiver's own test tones for full verification.