Front
Side
Rear
Subwoofer
Use headphones or 5.1/7.1 speakers
Stereo speakers test L/R only
Tap each node on the diagram
Individual channel playback
Use Auto Test for full sequence
All 8 channels in order
Stereo — left & right
Front × 3 · Rear × 2 · Sub
5.1 + Side L & Side R
Stereo Output Only
Browsers use stereo panning to simulate surround. True multichannel requires dedicated hardware.
Free Surround Sound Test
Verify every channel in your 5.1 or 7.1 surround setup. Test front, side, rear, and subwoofer channels individually or in automatic sequence — directly in your browser.
8-Channel Testing
Test all 8 channels of a 7.1 surround system: Front L/R, Center, Side L/R, Rear L/R, and Subwoofer. Each channel plays a distinct tone for easy identification.
Visual Speaker Map
An interactive room diagram shows every speaker position. Click any node to play that channel, or use Auto Test to sweep through all channels in the correct surround order.
Headphone Compatible
Works with headphones via stereo panning simulation. While true multichannel requires dedicated hardware, headphones provide a convincing surround experience using binaural pan positioning.
How Surround
Sound Works
5.1 Surround
The most common surround format. Five full-range speakers — Front Left, Center, Front Right, Rear Left, Rear Right — plus a subwoofer (the .1) for low-frequency effects. Standard in home theater and gaming setups.
7.1 Surround
Extends 5.1 by adding two side speakers. This creates a more enveloping soundfield, especially for sounds that move from front to back. Common in larger home theaters and high-end gaming headsets.
The Center Channel
The most important speaker in a movie setup — it handles about 60% of the audio, including all dialogue. Placed directly above or below your screen. Without it, voices can seem to come from the wrong direction.
LFE — The .1 Channel
Low Frequency Effects channel. This is a band-limited channel (typically 3Hz-120Hz) dedicated to bass-heavy sound effects like explosions. Your subwoofer plays this channel with high power.
Speaker Placement Guide
Correct speaker placement is the most important factor in surround sound performance.
Front Speakers
Place front left and right speakers at ear level, angled toward your listening position. They should form a 60° angle with you at the center. The center channel goes directly below or above your screen, facing you.
Surround Speakers
For 5.1, rear speakers go slightly behind and to the sides of your listening position at 110-120° angles. For 7.1, add side speakers at 90° and move rears to 135-150°. Keep them at ear height or slightly above.
Subwoofer Placement
Subwoofers are less directional, but placement still matters. The "subwoofer crawl" technique: place the sub at your listening position, play bass-heavy music, then crawl around the room and listen for where bass sounds best — that's where to put your sub.
Frequently Asked Questions
Q.Does this test real 5.1/7.1 output?
Browsers only support stereo output (2 channels). This test uses stereo panning to simulate surround — each channel is panned to its approximate direction. True multichannel output requires a dedicated soundcard or AV receiver with its own driver.
Q.Why can't I hear the rear channels?
If you're using stereo speakers, rear channels will play through both speakers with a center pan. With headphones, they'll appear as subtle panning. True rear channel separation requires physical rear speakers or a headphone with surround processing (like Dolby Atmos headphones).
Q.What is the Center (C) channel for?
In movies and TV, the center channel handles most dialogue — roughly 50-60% of the total audio. It anchors sound to the screen so voices seem to come from the actors rather than the speakers. It's often considered the most important speaker in a home theater.
Q.What is the SUB channel?
The subwoofer (LFE — Low Frequency Effects) channel carries discrete bass content, typically explosions, rumbles, and heavy bass in music. It's the ".1" in 5.1 and 7.1 — a limited bandwidth channel sent to a dedicated subwoofer.
Q.How do I test my gaming headset?
Many gaming headsets simulate surround sound using software (Windows Sonic, Dolby Atmos, DTS:X). With those enabled, this test will demonstrate how well your headset's virtual surround processing reproduces each channel's direction.
Q.What's the difference between 5.1 and 7.1?
5.1 has 5 speakers + 1 subwoofer. 7.1 adds 2 additional side speakers for a more enveloping soundfield, especially for sounds moving from front to back. The human ear is most sensitive to side-to-side direction, so 7.1 can feel more immersive.