Test your computer speakers online for free. Check left and right channels, stereo balance, frequency response and audio output directly in your browser.
Output device selection is controlled by your operating system.
Automated step-by-step check for both speakers, left channel, right channel, and stereo movement.
Click "Play Stereo Tone" to generate audio across both speakers.
Did you hear the sound?
Visualization reflects the mathematically generated audio signal in your browser, not physical acoustic room levels.
No Sound Output?
Only One Channel Audible?
Crackling or Distorted Sound?
Audio test tones are generated purely locally in your browser via the Web Audio API. No microphone access or audio uploads are ever performed.
Select Left, Right, or Both channels and play generated audio tones to verify channel output, volume levels, and stereo positioning.
Use independent L/R channel toggles to verify that audio routes cleanly to your physical left and right speaker drivers without crossover.
Run the Stereo Balance Test and smooth pan sweep to confirm seamless sound migration across the stereo soundstage.
Adjust the balance slider between 100% Left, Center, and 100% Right to check the perceived left/right balance between your speakers.
Execute preset tone tests from 100 Hz to 16 kHz or a 20 Hz-20 kHz sweep to evaluate how your speakers reproduce low, mid, and high frequencies.
Check physical 3.5mm/RCA cables, OS audio L/R balance settings, speaker power, amplifier switches, and browser output selection.
Distortion is typically caused by high system volume overdriving speaker cones, damaged driver surrounds, or loose cable jacks.
Run Quick Test at 30% volume to check built-in left and right laptop speakers for clarity and equal loudness.
Connect desktop speakers via USB, optical, or analog 3.5mm jack, ensure amplifier power is on, and verify stereo channel separation.
Speaker tests evaluate room-filling acoustic output and external speaker channel routing, whereas headphone tests check isolated ear canal drivers and binaural spatial imaging.
The W3C Web Audio API synthesizes precise mathematical audio waveforms (sine waves) directly inside local browser memory.
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