🎧 Stereo Channel Test
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🔊 Stereo speakers — sit centered
About
This is a free, open-source 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.