Browser fingerprint lab
Audio
A short signal is generated with OfflineAudioContext and passed through a compressor; the output samples differ slightly with each audio stack's floating-point implementation.
Running…
Result
Details
- Support
- Sample sum
- Audio hash
- Sample rate
- Count
- Max channels
- numberOfInputs / numberOfOutputs
- DynamicsCompressor
What this means
No permission is needed and nothing is played. For a given browser version and OS the result is quite stable, so trackers usually pair it with the canvas hash to cross-check a device. The "sample sum" itself is the value most scripts use.