Audio Latency & Microphone Delay Test

Understanding Audio Latency

This page reports the browser's estimate of its audio output buffering and device path. It does not measure microphone input, network delay, Bluetooth codec delay end to end, or a full recording round trip.

• Below 15 ms: Imperceptible. Ideal for recording while listening back in real time, and for gaming.
• 15 ms to 45 ms: Standard for USB audio devices and built-in laptop hardware. A slight flam is audible if you listen to yourself live.
• 45 ms to 100 ms: Increasingly obvious. Fine for playback and calls, awkward for anything you have to play or speak in time with.
• 100 ms to 300 ms+: Typical for Bluetooth wireless codecs (SBC/AAC). Unsuitable for real-time monitoring.

What this browser latency result includes

The reported value describes output buffering known to the browser. It may not include every delay introduced by Bluetooth transmission, a call server, a recording app, effects processing, or the microphone path. That makes the result best for comparing browsers and output devices on the same computer, not for claiming an exact end-to-end delay.

How to reduce microphone or Bluetooth delay

For live monitoring, use wired headphones or an audio interface with direct monitoring. Close applications that are also using the microphone, disable unnecessary audio effects, and test a different browser. Bluetooth delay is often part of the wireless codec and device buffer, so reconnecting can help a temporary fault but cannot remove the normal transport delay. See the Bluetooth audio delay guide for a focused checklist.