Device Check
Check how your headphones or speakers handle channel direction, stereo position, balance, bass, and other playback signals.
Guided Device Check
Step-by-step listening check covering channel routing, stereo balance, pink noise, acoustic phase, bass response, 20Hz–20kHz frequency range, and A/V sync.
Individual checks (11)
Choose a checkLeft / Right Channel Test
Check that left and right channels route to the correct ears without crosstalk or imbalance.
Stereo Imaging & Center
Test center sound localization, 5-point discrete panning, and smooth stereo pan sweep.
Left / Right Balance
Fine-tune channel balance with non-clipping digital attenuation and decibel readouts.
Frequency Range & Sweep
Explore audible frequency reproduction from 20 Hz to 20 kHz with discrete tones and continuous sweep.
Bass Response Check
Deep low-frequency tones (20–150 Hz) and slow sweeps to listen for buzzing, rattle, or seal leaks.
Polarity & Phase Alignment
Correlated in-phase vs inverted out-of-phase audio signals to detect wiring errors and cancellation issues.
Noise Floor & Burn-in Generator
Calibrated pink and white noise for acoustic evaluation, isolation checks, and driver conditioning.
Spatial Audio & Panning Check
Dynamic 3D spatial panning across 8 positions or continuous 360° circular orbit to test soundstage width.
A/V Latency Check
Check visual flash and auditory pulse alignment to evaluate perceptual delay.
Stereo vs Summed Mono
Summed mono playback with -3 dB normalization to check driver matching and center focus.
Audio Device Information
Browser audio context sample rate, maximum channel capacity, and active output endpoints.