Left/right audio channel test Left/right audio channel test

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.