Stereo & Polarity Test
Verify your stereo setup is correctly wired and in phase. This tool tests channel separation, stereo imaging, and speaker polarity — essential checks for any audio setup. Use the headphone audio test to measure driver matching and catch imbalances before a mixing session.
Channel Isolation Test
Plays audio to one channel at a time. You should only hear sound from the indicated side.
Stereo Pan Sweep
Sweeps audio continuously from left to right to verify smooth stereo imaging.
Polarity / Phase Test
Plays the same tone on both channels simultaneously. If your speakers are out of phase, the sound will seem to disappear or come from a strange location.
Out-of-phase: Sound may seem to disappear or thin out if speakers are close together.
Why Stereo and Polarity Testing Matters
Correct stereo wiring and phase alignment are fundamental to accurate sound reproduction. Even a single reversed speaker wire will cause comb filtering that drains bass and muddies the soundstage. Use the 3d directional sound test to experience HRTF-based 3D audio and verify your headphone's spatial reproduction.
Reversed speaker polarity reduces bass output and collapses the stereo image toward the centre — a subtle issue often mistaken for poor speaker quality or a recording problem. Use the audio latency test to confirm your audio chain is low-latency enough for live streaming or music production.
Channel Separation
- Sound from only the left channel should come from the left
- Crossover means cables may be swapped or wiring is incorrect
- Critical for gaming positional audio and studio monitoring
Phase / Polarity
- Out-of-phase speakers cancel bass frequencies
- Stereo imaging collapses when channels are inverted
- Common cause of thin, weak sound from a stereo pair
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