Stereo Left/Right Test Video
Plays a tone in the left channel only for 5 seconds (with a LEFT CHANNEL label), then the right channel only for 5 seconds (with a RIGHT CHANNEL label), so you can confirm each speaker or earbud is wired and mapped correctly.
What these files actually are
Channel isolation is real, not simulated panning: each half of the clip has audio present on exactly one channel and silence on the other.
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DownloadStereo left/right test video (MP4)MP4 · 208 KB VirusTotal report
Are these files safe to download?
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Specs
- Resolution
- 1280x720
- Sequence
- 0-5s: left channel only + "LEFT CHANNEL" label; 5-10s: right channel only + "RIGHT CHANNEL" label
- Audio
- AAC stereo, distinct tone per channel
Common use cases
Headphone and earbud checks
Confirm left and right are not swapped and that both sides actually produce sound.
Speaker wiring verification
Check a stereo speaker setup, soundbar, or car audio system for correctly wired left/right channels.
App and player channel-mapping tests
Verify your video player or app correctly passes through discrete stereo channels rather than downmixing to mono.
Frequently asked questions
- How do I know if my channels are swapped?
- If sound comes from your right speaker while the screen says "LEFT CHANNEL", your left/right output is swapped somewhere in the chain.
- Is the silence on the other channel really silent?
- Yes, each segment routes the tone to only one channel with the other explicitly zeroed, not just panned down.