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Speaker & Headphone Stereo Test

Play a short left-channel or right-channel tone to check your speakers or headphones.

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Good to know: Uses a quiet 440 Hz test tone, started only by your click, and stops after three seconds or when you leave or hide the page. Start with low device volume. No microphone permission is requested. Mono accessibility settings, Bluetooth processing, or speaker wiring can mix channels; this is a listening check, not a calibrated hardware diagnosis.

How to use it (step by step)

  1. 1Turn device volume down and put on your headphones or position your speakers.
  2. 2Press Test left, then Test right. Each tone should come from its indicated side; each stops after three seconds.
  3. 3Use Stop sound at any time. If both sides play, check mono-audio settings and your output device.

Words to know

Stereo
Audio with separate left and right channels.
Mono
Audio mixed into one channel, which may play through both speakers.

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