Audio · local output
Speaker Test
Send short, low-level tones to the browser's left, right, or dual-mono stereo route. Decibic generates the signal; only you can confirm what came from the physical output.
Protect your hearing before you start
Lower the system and hardware volume first. Keep headphones off your ears while setting the level, then stop immediately if a tone feels sharp, loud, or uncomfortable.
How to use
- Acknowledge the safety check with system volume low.
- Test Left, Dual mono, and Right, or run the guided sequence.
- Record what you heard; do not treat it as an automatic diagnosis.
Control desk
Output signal
Every signal lasts briefly and must be started from one of these controls.
Silent — no audio graph is running.
Listen for whether the requested side, both sides, or neither side produced the tone.
Web Audio output only · no microphone · no permission prompt · system-default output · no recording. Downstream mono, accessibility, Bluetooth, receiver, or soundbar processing can remix channels.
Your listening notes
These selections are your observations only. They stay in this page and are cleared on Reset.
No observations recorded.
What this check can tell you
The browser requests a known stereo route. Your listening notes can help spot silence, swapped sides, or downstream mono mixing worth investigating.
What it cannot verify
- It cannot hear, identify, calibrate, or certify physical speakers.
- It cannot measure loudness, distortion, frequency response, wiring, or channel placement.
- Silence does not prove hardware failure; check mute, the selected system output, cables, and app routing.