Understand what this stereo surround demonstration can check
This implementation produces two-channel audio. Front Left and Front Right are panned tones; Center is shared between them. The surround buttons add partial panning and right-channel inversion for a diffuse effect.
A repeatable check
- Lower volume and try Front Left, then Front Right, to verify basic stereo routing.
- Try Center and the two surround buttons to compare the stereo images. Different pitches identify the selections.
- For physical 5.1 or 7.1 speaker identification, continue with your receiver or operating system's multichannel test.
What the result suggests
- Center comes from the two front speakers
- That is expected here: the center signal is a stereo phantom center, not a discrete center-channel stream.
- Surround buttons do not activate rear speakers
- This does not establish a rear-speaker fault. Receiver upmixing and routing determine how this stereo signal is distributed; use a discrete multichannel test for rear-channel verification.
What this cannot establish
The labels do not mean that separate rear, center, or LFE channels are being sent. This tool cannot verify discrete surround wiring, Dolby/DTS decoding, or channel-level calibration.
Frequently Asked Questions
Why does Center play from my front pair?
This tool sends the center tone to both stereo channels. The perceived image between the speakers is a phantom center; it is not a discrete center-channel signal.
Can this verify my receiver's rear channels or Dolby/DTS decoding?
No. This implementation generates two-channel tones without an encoded multichannel soundtrack. Use the receiver's own channel test or a verified multichannel test source, with the matching output configuration.
Does a silent rear speaker mean it is broken?
Not in this demonstration. Your receiver's stereo routing and upmixing decide whether rear speakers receive anything. Check each physical speaker with a discrete multichannel test before changing cables.