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How to Use This Test

  1. Put on your headphones or position yourself between your speakers
  2. Click the Play button below to start the test
  3. Listen carefully – you should hear "Left" only from the left, "Right" only from the right
  4. If both ears hear the same, you may have mono audio or a wiring issue

✓ Expected result: Clear left/right separation · ✗ Problem: Hearing both channels in both ears

🎧 Sound Test – Check Your Speakers Online

Test your left & right speakers with real-time audio waveform visualization.

No microphone access needed — all audio is generated locally.

Keyboard: L/R/B = channels, 1/2/3 = modes, Esc = stop

Frequency440Hz
Left Channel
Right Channel
🎧 Use headphones for best results
About

This is a free stereo channel test tool. No ads, no tracking. Test your left/right speakers, headphones, or soundbar. Uses the Web Audio API — works offline as a PWA. All audio is generated locally in your browser.

What This Test Detects

✓Channel Balance

Verifies left and right channels are working independently

✓Mono Audio Issues

Detects if both channels are playing identical audio

✓Wiring Problems

Identifies reversed or incorrectly connected speaker cables

✓Dead Channels

Finds completely silent left or right channels