Hear the real audio delay difference between two devices. Play a short sound on both outputs and instantly hear which one is slower.
How to compare 2 headphones
This tool lets you compare audio latency using your ears only. Select two audio output devices, play a short click sound, and listen for which one reacts later.
Select Device A and Device B from the audio output list.
Press play to trigger a short click on both outputs.
Listen to the delay - it may sound like an echo or like one of the sounds is slightly offset.
Bluetooth headphones typically introduce noticeable latency (about 100–300 ms), while wired devices are usually much faster. This test helps you feel that difference instantly without any extra hardware.
Test modes
1. Simultaneous mode (A + B)
Both devices play the same short sound at the same time. You may hear it as:
a single blended click (if delays are similar), or
a double click or echo (if one device is slower).
2. Sequential mode (A → B)
The sound plays first on one device, then on the other:
if the sounds play exactly one after the other, the difference in latency is minimal,
if one sound is delayed or overlaps another, it means one device is creating a larger delay.
Why use this test?
Detect Bluetooth audio latency instantly
Compare different headphones, earbuds, or speakers
Check audio sync for gaming, movies, conferencing, or video editing
This A/B listening test complements microphone-based latency measurement by giving you a simple, subjective way to compare real-world delay between any two devices.
Tips for better accuracy
Set both devices to similar volume levels.
Place them close to each other and at similar distance from your ears.
Repeat the playback several times and listen for consistent patterns.
When switching outputs, give Bluetooth devices 1–3 seconds to reconnect and re-buffer before judging latency.