Left/right audio channel test

  1. Input
  2. Options
  3. Result

How to use this tool →

Quick start

Check headphone sides and frequency range in a few seconds.

  1. Set volume to 30–50%
  2. Compare left, right and center
  3. Run the frequency sweep

Left/right audio channel test

Check left and right audio channels online. Play a generated test signal to identify the left and right headphone, or upload an audio/video file to inspect peak level, average loudness, balance, mono, duplicated mono and nearly identical stereo.

Useful when you need to confirm that headphones are worn correctly and left/right channels are not swapped. A high correlation close to 1.0 often means both channels are nearly the same. A strong balance offset means one channel is louder than the other.

✓ Useful when you need to confirm that headphones are worn correctly and left/right channels are not swapped.
✓ A high correlation close to 1.0 often means both channels are nearly the same.
✓ A strong balance offset means one channel is louder than the other.
✓ Solo playback sends one channel to both ears, making differences easier to hear.
✓ Files are decoded in the browser and are not uploaded for analysis.
✓ Browser codec support depends on the device and installed media stack.

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