How accurate is the live audio latency test?

Live results depend on device drivers, microphone placement, and room acoustics. For best accuracy, place the mic close to the speaker, keep volume moderate, and run multiple trials.

Does this tool upload my audio to a server?

No. Audio capture and file analysis are processed locally in your browser.

What does the File Analyzer measure?

It detects the first transient in your audio to estimate leading silence, and can export a trimmed WAV starting at that point.

Audio Latency Test

Measure round-trip latency (speakers → mic) or analyze audio files for leading silence.

Round-Trip Latency

Use headphones and keep volume moderate.

Standby

Measured Latency

—ms

—

Browser Reported

—ms

Base/output latency if supported

Sample Rate

—Hz

Context rate used for test

Waveform (Detected Click)

Tip: Place mic close to speakers for stronger detection. Privacy: Audio stays in your browser.

Settings

Output Volume 50%

Detection Sensitivity Medium

Record Duration 2.5s

Auto-run

Recompute on change

Test Signal

How to Use

Connect Audio: Ensure your microphone and speakers are connected.
Position Mic: Place your microphone close to the speaker (10-20cm).
Start Test: Click the Start button.
Wait for Sound: A test signal will play and be recorded.
View Results: The round-trip latency is displayed instantly.

Tip: If detection fails, increase volume or move the mic closer. "Chirp" signal is more robust against noise.

File Analyzer

Detect leading silence and optionally trim/export WAV.

Open File

Leading Silence

—ms

Detected first transient

Peak Level

—

Max abs amplitude (0–1)

Sample Rate

—Hz

Decoded audio buffer rate

Waveform Analysis No file loaded

Detection Settings

Transient Threshold 0.06

Higher threshold ignores noise; lower threshold finds earlier transients.

Auto-trim

Update on threshold change

Notes

For the most accurate latency result, use Live Test with a mic and speakers on the same device.

The File Analyzer estimates leading silence and can export a trimmed WAV. If you recorded a loopback test externally, leading silence can approximate your offset.

All processing happens locally in your browser.

What is audio round-trip latency?

Round-trip latency is the delay from when your device plays a sound to when your microphone captures it again. It includes output buffering, speaker/mic hardware, driver processing, and input buffering.

Measure Latency

Estimate your real-world speaker-to-mic delay in milliseconds using an audible click or chirp.

Export Results

Download the captured recording WAV and analysis JSON for documentation or debugging.

Trim Silence

Analyze uploaded audio files, detect the first transient, and export a trimmed WAV instantly.

Accuracy tips

Use headphones or keep speaker volume moderate to reduce feedback loops.
Place the microphone close to the speaker for stronger detection.
Run the test multiple times and compare the median latency.